Double Hump Heads Horsepower

What a BARGAIN! When I was a teenager in high school aluminum heads were something I could only dream of. I actually went through several lists and made some corrections before making this list. TFS is introducing its DHC (double-hump) castings for small-block Chevys that look like the original "fuelie heads" with the double-hump casting bumps, and they will also be available with optional bosses and bolt-holes to accept later accessories. Free Shipping on order over $100! Special exceptions apply - click here for details. 020 intake & 1. 94 Sbc # 462 Double Hump Date Matched Cylinder Heads Chevy # 3890462. No more searching junkyards looking for cylinder heads for your motor. Posted By: Mike S Date: 7/10/2005 10:08 Hey guy's just wondering what brand and number everyone out there is running in those old heads now. This motor run the day it was removed. Holidays on the net. What do the markings look like on the Heads that are on the engine now?. Plus, as has been said already, the double humps were good in their day1960's, sooooo many better heads have been made since then to even consider them for any kind of performance application. intake and an edlebrock 850cfm carb. Chevy Double Hump Heads Boats for sale pistons ect. I've heard these heads are not the best choice. From engines of a simple bolt-it-together spec, these are good numbers. Locate car dealers and find your car at Autotrader!. It was still good for 14 flat in the quarter mile. Quick-And-Easy Bolt-On 70 HP All We Did Was Add A Cylinder Head And A Camshaft To This Little Small-Block Chevy, And On The Dyno It Delivered A Quick-And-Easy Bolt-On 70 HP By Jeff Smith Photography by Jeff Smith This is a story about how a hydraulic roller cam and a pair of AFR heads were worth more than 70 hp in a real street-driven small. 02 valves,hi performance 302/Z28//vette 350-350 horsepower. For over 40 years Chevrolet has developed heads for all types of uses, including stock, high-performance, smog emissions and over-the-counter all-out race heads. No's 1-7 have nonhardened exhaust valve seats which must be replaced for use with unleaded fuel. Top Ten Production CSB Cylinder Heads No's 1-6 are small-chamber, hi-comp and must have dished pistons to get comp below 10. double eyebrow pistons, a competition cam with a 262 duration and a 471 lift. The Buick’s LT1 motor was slightly different from the LT1 placed in the Corvette. Trade Parts Chevy Racing Engine Sand Rail Hurst Shifter Sraight Axle. With a coat of Chevy Orange paint, you'll have everyone convinced you're running an original set of 461 double hump heads. 60" valves, 64CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 62CC's. They're not $25 apiece, but the price on them has dropped through the floor. They had 2. The heads I have now are 1. Compress the air/fuel mixture into a smaller volume (increasing compression ratio) and you've got a mixture that's easier to ignite, burns quicker and more completely, and hence delivers more power. Idle Problems With Performance Camshaft I have read almost every article and threads on the Internet about this problem, but haven't found a working solution for my setup. Holidays on the net. Fresh built 350 with double hump heads and 300 hp cam. Colder heat ranges must be used in engines with. Chevrolet Cylinder Head Dyno Test The Horsepower Monster So we took a pair of $50 Chevy swap meet heads and put them up against a set of new Iron Eagles from Dart. chevy sb double hump heads how do you ? the horsepower is i find in the books are 3 rated their was a 275 hp 300hp & 350hp. 60 double hump heads that a friend of mine has. There are two types of double hump heads -- large hump and small hump --. - SBC Cylinder Head Info - I've compiled the following information on SBC Cylinder heads to help compare them. 601's should take a 1. No's 1-7 have nonhardened exhaust valve seats which must be replaced for use with unleaded fuel. An aluminum head casting – distinguished by Chevy Bowtie logos at each end – and a valvetrain with high-rpm, LS-style beehive-type valve springs stretches the performance range of the heads to enable greater power at a higher rpm. probably get some decent performance out of them, but they have no holes for accessory mounting. I used to run 89 octane with the camel hump heads, but I can now run 87 octane with the AFR heads. Our staff of truck experts and simple-to-use site make it easy to upgrade your ride. Engine has been dyno tested to produce 448 hp and 505 ft lb torque on pump gas. 50 170 cc int runners 7 degree hardened locks and chrome Moly retainers New Stainless Performance Valves High Performance Springs 3 angle competition valve job. 50" Corvette - 327 w/300 hp Pass. The engine is a stock 350 4 bolt main out of a 68 camaro. Cylinder Heads OE heads with adjustable valve train Hardened locks and retainers Performance valves Comp Performance springs 3 angle competition valve job. double hump heads are better. miles show 57k but dont know if orig. My engine is a modified Chevy 350 with ported double hump heads, roller lifters and lots of more performance stuff. 291's are virtually identical to 462's according to David Vizard's book on Chevy's. The Dart heads offer superior air flow to the early "double hump" heads. These heads were used from 1968 to 1970, and they were nicknamed the "fuelie. 02 heads have some machine work done to unshroud the intake valve. i will be using a solid roller cam. Small block chevy head castings; Double hump heads, no accessory holes 172 intake runners good HP head used in trucks, no accessory holes. I have all the books on blocks and heads over at my other house but you can find books that explain the differences and advantages in the heads Chevy built. These heads achieved notoriety during the heyday of Super Stock drag racing when porting was not allowed. The Buick’s LT1 motor was slightly different from the LT1 placed in the Corvette. this unshrouds them. I am wanting to do a cheap top end build/swap on my 92 chevy TBI 350 to "pep" it up a little. Blending the port behind the intake valve will help with flow. The block casting number on small block and big block Chevrolet V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. Porting and Polishing For Maximum Horsepower By Eddies Performance Polishing and porting your engines vital breathing parts is an important part of blueprinting your motor for maximum performance. Two versions were made for the 327 and 350 engines, one with a larger valve package (2. Then Chevy came out with the famous Bow Tie performance heads for the small block, which were even better than the original double-hump heads. complete engine and power glide transmission. 1968 327 C. Which pan fits best the holley 302-2 or the gm performance pan. For a more accurate calculation try Larry Meaux's Pipe Max. I have formatted each cylinder heads information into individual files for use with different versions of DeskTop Dyno, DynoSim, Comp Cams CamQuest program, Dynomation Versions 4 and 5 and Performance Trends Engine Analyzer. Performance Performance Head Gaskets. The list of hardware is impressive, including an upgraded camshaft, stroker crank, ported double-hump heads, and a 4-barrel carburetor on an aluminum intake. The most common heads sought by engine builders are ones identified variously as the "Camel Back," "Double Hump" or "Humper" heads used. it may have a steel crank but i do not know. - SBC Cylinder Head Info - I've compiled the following information on SBC Cylinder heads to help compare them. 02" intake and 1. Double-hump heads were offered up through the 492 head that was featured on the 350ci LT1 engine in the early '70s. Valve Train Comp Cam 218/224 493/500 110 Comp hydraulic lifters Comp double roller timing set Scorpion Aluminum Roller Rockers Hardened Screw in studs and guide plates. Combustion chamber design was most important in these new heads: LA engine cylinder heads were given a full-relief open-chamber design, but the Magnum was engineered with a double-quench closed-chamber type. 0:1 compression ratio. By the time you purchased a used double hump cylinder head and had it reworked, the cost was the same as buying a new Vortec head that produced more power. Trick Flow products perform as advertised and exceed customer's expectations for performance and value. Disclaimer © 2002-2019 JNPSoft Corporation. What is a double camel hump cylinder head? Its suppossed to be a high performance casting for chevy small blocks, marked on the side of the heads by a double hump. The double humps are cast iron also, much harder to weld than the aluminum LS heads. Super Chevy features world famous magazines including Camaro Performers, Super Chevy, Corvette Fever, and Chevy Hi-Tech Performance. Circle track racers were tossing their double hump heads as fast as they could buy the new Vortec heads. “Double-hump” heads were found on many of its high-performance engines in the 1960s and early 1970s. It’s kind of a double-edged sword when the caution comes out late like that in the stage. As long as we're talking about double hump heads, the "461X" castings have about 15cc more intake volume than any of the rest of the double hump heads. (0 reviews) $ 850. Yes the double hump heads was a great head, 30-40 years ago. 1967 Camaro Fuelie Double Hump #3880462 Cylinder Heads. It has the best of the best old school drive train. I want something that will give me a. One other thing that might be an issue is that all the Camel hump heads I've seen have straight plugs i. An LT1 cam and lifter kit. Small block Chevy Sbc 492 angle plug heads 2. A Small Block Chevy tech site with Block casting numbers, Cylinder head casting numbers and much more information. 1965 Chevy 3782461 Camel Hump Heads 2. I'm using. The quickest way to identify these high-performance Chevy heads is this double hump at the end of each head. Find Summit Racing® Cast Iron Cylinder Heads for Small Chevy SUM-152123. Call to get block casting date code. By the time you purchased a used double hump cylinder head and had it reworked, the cost was the same as buying a new Vortec head that produced more power. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads. Free Shipping on order over $100! Special exceptions apply - click here for details. SJKMarine - Complete selection of marine supplies. 50 exhaust while the bottom head is the performance version (325hp and higher) used on 67-68 327 applications with 2. General Recommendations for AFR Cylinder Heads: Bar Codes - Please keep the bar code & paperwork shipped with your head, these contain all the specs for your heads when calling AFR. Browse our popular custom built engine packages built to your specifications. timeing Retarted. Corvette Original Small Block 350200hp Cylinder Head Pair H-25-1 I-2. 60 exhaust, 64 cc combustion chamber. Double jointed people. Chevrolet 305 with 327 crank, comp cam, double hump 365 heads with 202 valves Tunnel ram with 2- 450 Holley carbs. 02" intake valves. What a BARGAIN! When I was a teenager in high school aluminum heads were something I could only dream of. Trick Flow Specialties is a leading designer and manufacturer of high performance cylinder heads, intake manifolds, and engine components. 40 Chevrolet from $4,800. I actually went through several lists and made some corrections before making this list. Small block chevy head castings; Double hump heads, no accessory holes 172 intake runners good HP head used in trucks, no accessory holes. BPE Racing Heads 702 Dunn Way Placentia CA 92870-6805 Electronic mail addresses (Due to worm programs, type in address. If you do have a head with a number not listed here, you can find it in "Chevrolet By The Numbers" by Alan Colvin. No othe Hi-Performance or high-rise intake will be permitted. “Double-hump” heads were found on many of its high-performance engines in the 1960s and early 1970s. Small block Chevy Sbc 492 angle plug heads 2. FOR SALE OR TRADE TRADE TRADE. do NOT contact me with unsolicited services or offers. Canfield Cylinder Heads available in various stages of porting for all applications, both high performance street rod/ weekend warrior and all out racing. As long as we're talking about double hump heads, the "461X" castings have about 15cc more intake volume than any of the rest of the double hump heads. also I have an msd 6al box on a stock distributer w/a points conversion kit in it. Horsepower Season 13. Extremely rare. Find Double In Stock Now. 14, 2019, in a lawsuit that accuses Sparks of defaming the former headmaster of a private Christian school he founded in North Carolina. Cylinder Head ID. 50 exhaust valves. The heads flowed 237/160 @. The best double hump head only flowed 218 cfm Vortec heads are no where close to $1500 and flows 239 cfm and factory stock GM iron heads which makes the the best production GM iron head. Cast 356-T6 aluminium with 56cc combustion chambers these heads offer unbelievable HP straight out of the box. I found these heads on craigslist and was wondering if they are any good. If my thinking is correct, 64cc heads being used on a 1970 engine it would of had accessory holes in the front of the heads. FLOTEK is a leading brand of aluminum high-performance cylinder heads. These heads were used from 1968 to 1970, and they were nicknamed the "fuelie. anyway, im gonna have them hot tanked and magnaflaxed by a local shop. As new castings are released on late models keep your eyes open for the new numbers. transmission and rearend. "492 – 3991492. 1967-68 Corvette Camaro Nova Impala 3917291 Double Hump Bare Heads/pr. The Bogleheads® emphasize starting early, living below one's means, regular saving, broad diversification, simplicity. My engine is a modified Chevy 350 with ported double hump heads, roller lifters and lots of more performance stuff. Lowry, Holmes share Open lead as McIlroy heads home Shane Lowry birdied four of his opening five holes on his way to a 4-under 67 and shared the 36-hole lead with J. I am wanting to do a cheap top end build/swap on my 92 chevy TBI 350 to "pep" it up a little. Seller: autobarnclassics Phone: 1-800-650-1055 Description: STK 2507 1969 Chevrolet Camaro. 3890462 SBC DOUBLE Hump Camelback Heads 1967 Chevelle Camaro Corvette Nova - $1,200. 02 intake and 1. I have a pair of "186" double hump heads circa 1968 on a 350 in my 88 Chevy truck. timeing Retarted. 510 lift), edelbrock performer rpm air gap intake w/edelbrock 750 carb. ) PLEASE CALL FOR MORE PROMOTIONAL PRICING AND SALES!. 5's in the 1\8 of a mile and i have. If my thinking is correct, 64cc heads being used on a 1970 engine it would of had accessory holes in the front of the heads. Small block Chevy 461 double hump 2. 02 valves WILL fit, but they are shrouded hard by the cylinder wall, so stick with 1. For instance, there are circus performers who can bend their bodies to the back from the waist, locking their heads in between their legs. Trick Flow products perform as advertised and exceed customer's expectations for performance and value. In 63 a 300hp version was available with double humps but the 250 hp engine was still available until 1965. Here, 10 things you've. 291's are virtually identical to 462's according to David Vizard's book on Chevy's. Another good performance head. quit gear drive. 94" intake valves which I switched out for 2. Although many magazine buildups stress top-end horsepower, our goal is to maximize torque. Rare 1965 date. These heads had no accessory mounting bosses and bolt holes. How to Select the Perfect Holley Carburetor for Your Car. Chevy 461 High Performance Heads: Referred to as "Double Hump" these are the high performance ones with the "X" markings, these were the secret the GM used to achieve the highest horsepower rating for the Corvettes fuel injection system. Flow characteristics, on double hump heads are very limited, even with drastic porting they wont flow much past. These engines have a GREAT old school sound! These engines are completely custom rebuilt 1960s era Chevy 327 - 350, 365, and 375 horsepower engines. was a little weak on the bottom with the Powerglide,I changed to a T350 and am very happy with it. The most recognized end casting identifier of the SBC heads is the "fuelie", "double hump", or "camel hump". These heads achieved notoriety during the heyday of Super Stock drag racing when porting was not allowed. 3890462 SBC DOUBLE Hump Camelback Heads 1967 Chevelle Camaro Corvette Nova - $1,200. 60-inch valve sizes. This mark is found on many medium and high performance heads of the 1960'sMany times this mark has been mistakenly beleived to be the. (Note: If you click the buttons more than once,. They were used on high-performance models of the 265 and 283 engines, and were also used on the standard 195-horse 2-barrel 283's in the later years of that engine. camel hump heads vs. "Double-hump" heads were found on many of its high-performance engines in the 1960s and early 1970s. 5001 : 74 : 1971-73: 330862 : 400 : 1. Although many magazine buildups stress top-end horsepower, our goal is to maximize torque. 60 valves but thats about all I know. Also, take note that these heads have no accessory bolt holes for the front drive (just like original 461s). 94 heads machined for the 2. Holley 0-4779sae 750 Cfm Aluminium Double Pumper Carburetor. Launched in 1998, the 3200 GT was the first of a new generation of Maseratis produced under Ferrari management. the car runs, drives, and looks beautiful. was a little weak on the bottom with the Powerglide,I changed to a T350 and am very happy with it. As new castings are released on late models keep your eyes open for the new numbers. From a medical viewpoint, being double jointed is also known as having hypermobility. Cylinder heads are the famous fuelie heads!. 600 Stainless Date Code 92965 327. The part number is 3890462. ground up restoration, need to sell husband passed away, and im moving home, thanks for looking. 60), and the other with a smaller (1. A-Team Performance SBC Small Block Angle Plug Aluminum Cylinder Heads Set 64cc 2. Rotating Assembly. Since 1938, Edelbrock has manufactured its core products in the USA for quality & performance. Two versions were made for the 327 and 350 engines, one with a larger valve package (2. Then Chevy came out with the famous Bow Tie performance heads for the small block, which were even better than the original double-hump heads. 020 intake & 1. Trick Flow Specialties is a leading designer and manufacturer of high performance cylinder heads, intake manifolds, and engine components. 60" valves, 64CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 62CC's. Since there were zero aftermarket heads available, the best Chevy head of the time was very desirable. I need help picking a cam for my 87 350 engine. And cc them regardless so you know exactly how big their chambers are!! They both should have about 160 cc intake ports!!. Chevy 462 High Performance Heads: Referred to as "double hump" these are the high horsepower ones with the 2. balanced, metric rings pack, 10. Designed by Ford Performance for use on its crate engines, the M-6675-DRS302 oil pan is constructed to deliver power and durability. We have everything from acid ported to fully ported cast iron intake manifolds that work terrific with “double hump” heads. Rest of interior needs attention. For performance applications, there are other GM castings that are similar in specs. Car and Truck Cylinder Heads and Parts. They were found on 1970 LT-1 engines. 000 coarse thread - aftermarket dry deck block. Air flow is the key to horsepower. original interior with in dash tac, bucket seats and console. 4 barrel, dual exhaust, and a 4 speed with original shifter. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads. 5 compression in my engine , do I need lower cc cylinders heads or higher cc cylinder heads. 510 lift), edelbrock performer rpm air gap intake w/edelbrock 750 carb. It got the name fuelie from the fact that it was used on optional high performance fuel injected SBC engines, mainly installed in the Corvette. But looking at the flow data and price, the Canfields look the best. Chevy put a cast identifier on the end of the headslike a "double hump", a triangle, a saw tooth shape, etc. Heads For Sale. 50 - TS-HH250-BE online - Supercheap Auto Performance Parts Air Intake System Performance Filters Kch Heads. Sbc 461 double hump 2. If I need to change them I'll do it before I put it in the car. work on those heads but stock brackets from the 327 wont work with a 305's long water pump and pulleys, and stock 305 mounts won't work on non drilled 327 heads Alan Grove sells some nice brackets to fit that type setup. 60 with standard valve angle and spacing is very tight if the margin is wide over seat angle. It came with 172cc runners and a larger combustion chamber. Cylinder Head ID. And best of all, you’ll find our games on mobile, console, PC, and many other devices – you may even be able to play them on the moon!. As new castings are released on late models keep your eyes open for the new numbers. YTABH308-1 Holden Cylinder Heads. A Small Block Chevy tech site with Block casting numbers, Cylinder head casting numbers and much more information. The casting number ends in "461X". They aint bad but more power can be made with other heads. We appreciate the support and encouragement we have received from our visitors around the world. Then Chevy came out with the famous Bow Tie performance heads for the small block, which were even better than the original double-hump heads. I am adding 461 double hump heads a edelbrock performer rpm cam (234/244 dur @. 4 barrel, dual exhaust, and a 4 speed with original shifter. You can do the whole swap up to MPFI, intake, heads, cam, PCM, the whole shebang, but it’ll probably be spendy. By the time you purchased a used double hump cylinder head and had it reworked, the cost was the same as buying a new Vortec head that produced more power. Chevy 461 High Performance Heads: Referred to as "Double Hump" these are the high performance ones with the "X" markings, these were the secret the GM used to achieve the highest horsepower rating for the Corvettes fuel injection system. Port the heads with a port match, and try to get them open enough that they will breath. 94" and Exhaust 1. How to identify camel hump (aka double hump) small block chevy heads How to port and polish high performance v8. They were found on 1970 LT-1 engines. Chevrolet Cylinder Head Dyno Test The Horsepower Monster So we took a pair of $50 Chevy swap meet heads and put them up against a set of new Iron Eagles from Dart. Colder heat ranges must be used in engines with. Also be aware that there are two types of the "dubble hump" heads you would want the later ones with the accessory bolt holes for a 3rd gen car as the early ones wont accept the factory alternater and P/S mounts and would be a pain to mount. Common Pontiac Engine Displacements : (click the button for that bore and stroke for each engine) Click the following to add to the bore size. Reduced performance and a drop in engine levels can be caused by a faulty cylinder head. This mark is found on many medium and high performance heads of the 1960'sMany times this mark has been mistakenly beleived to be the. 60 valves but thats about all I know. Are camel humps the same as "Double Hump"? ALso, thanks for the heads up, I was a little worried about buying those heads specially being older model, out of date, and all though it's had a lot of work and he's selling them wit hthe rockers, studs, screws and headers for only 500 bucks, I didn't know what to think so yeah, I think i'll pass and go on ebay. Double jointed people. I have formatted each cylinder heads information into individual files for use with different versions of DeskTop Dyno, DynoSim, Comp Cams CamQuest program, Dynomation Versions 4 and 5 and Performance Trends Engine Analyzer. Replacing the stock heads is the second best mod you can make, next to the exhaust work. Without cylinders, the car won't run, and all the cylinders need to be working for the vehicle to perform efficiently. 20 results for double hump heads Save double hump heads to get e-mail alerts and updates on your eBay Feed. What is a double camel hump cylinder head? Its suppossed to be a high performance casting for chevy small blocks, marked on the side of the heads by a double hump. Small block chevy head castings; Double hump heads, no accessory holes 172 intake runners good HP head used in trucks, no accessory holes. New Aluminum Double Hump Heads!! 11-03-2016, 10:38 PM Flow 258cfm at 500 lift, those heads are good N/A for 500 hp on a small block, do 700 easy on a 150 shot. most double humps on 327's came w/ 1. Cylinder Heads New Vortec Heads 1. I can't give you a horsepower number, but it would be a fun engine for sure. How to identify camel hump (aka double hump) small block chevy heads How to port and polish high performance v8. The heads I have now are 1. As you can see below, we build carbureted, fuel injected, blown and/or nitrous oxide engines, including small blocks, big blocks and strokers in all shapes and sizes for bad to the bone street cars, street/strip cars, weekend warriors, road racing, SCCA, vintage racers, auto cross, BOATS, and many other stock, performance & race applications. The list of hardware is impressive, including an upgraded camshaft, stroker crank, ported double-hump heads, and a 4-barrel carburetor on an aluminum intake. I have a lot of interior pieces (bench seats, other misc parts). The "double hump" heads were of the 1965 Fuel. September 4, 2018 09:53: 1941 Ford pickup posted by scottl55 Please contact me for details. What got the performance enthusiast's attention was the increase in horsepower from 200 to 255 solely based on the power generated by these heads. the damper pulley is not bolted to the crank. Posted By: Mike S Date: 7/10/2005 10:08 Hey guy's just wondering what brand and number everyone out there is running in those old heads now. Fresh performance built 700R4 overdrive transmission. How much hp does 350 have with double hump heads have? 350 hp double hump head are high compression ,if you are building it ,then you will have to make sure that squish/quench area is around. Heads For Sale. Good Heads same as the 194 double hump and used only in 1968 on the Impala. Promoting a range of prices for torinoautomatictransshifter tunnel hump steel. 72's found on standard heads. chevy sb double hump heads how do you ? the horsepower is i find in the books are 3 rated their was a 275 hp 300hp & 350hp. Car and Truck Cylinder Heads and Parts. I know that Chevy Casting Numbers are on several sites on the World Wide Web but I thought it would be a good idea to list them here too. Secure login form. Top Quality Custom Built Engines. , you can monitor your system’s performance. One other area where you might have some confusion is rebuilt cylinder heads. The fittings are black anodized billet aluminum and attach to the corners of your GM LS cylinder heads. The easiest way to reference any production head is with the last three digits of its casting number. 030 over bore, balanced SCAT rotating assembly with all paperwork, forged rods, wiesco forged gas ported pistons, 462 camel hump heads ported and polished, stainless steel valves, competition valve job, screw in Small Block Chevy 350 4 bolt main all new top to bottom (casselberry fl) $7500. You can buy aftermarket Brodix IK200 alum heads tha flows 265 cfm fr $1100. There was a noticeable lack of torque, but it ran well on the top end. A Small Block Chevy tech site with Block casting numbers, Cylinder head casting numbers and much more information. 6 mm) valve diameter high-performance 327 double-hump '461 heads, pushrod guide plates, hardened 'blue-stripe' pushrods, edge-orifice lifters to keep more valvetrain oil in the crankcase for high-rpm lubrication, and stiffer valvesprings. be more concerned with the chamber wall shrouding the valves when open at max lift. Double-hump heads are a specific casting of cylinder heads for Chevrolet’s Small-Block V8 engine. For Sale: 1966 Chevy SB Heads 327 350 hp double hump heads 3890462 327 350 hp, F 2 6 and F 6 6 June 2, and 6 1966. my question is, how much hp can. The most widly known is the "Double Hump","Camel Backs",and "Humper". He doesn't give actual numbers, but Brian sounds right. For the flow remember bigger is not always best. Like the stock 96-00 vortec L31 heads is a good 30-35 HP gain over the double hump heads. double eyebrow pistons, a competition cam with a 262 duration and a 471 lift. And best of all, you’ll find our games on mobile, console, PC, and many other devices – you may even be able to play them on the moon!. most double humps on 327's came w/ 1. was a little weak on the bottom with the Powerglide,I changed to a T350 and am very happy with it. I can't give you a horsepower number, but it would be a fun engine for sure. I'm currently running a 355 gear with plans maybe to covert to a 373. Innovative and visually dramatic, it also had all the power and performance that customers expected of the marque, being capable of an impressive 174 mph and 0-62 mph in 5. i am using gm 462 2. 350 chev in pieces 4 bolt mains 010 block 40 THOU over decked grout filled line bored balanced new forged dome top pistons ,new conrods,crane solid cam mildon gear drive super victor polished manifold ,balanced flex plate ,high volume sump hq to wb , roller rockers, stud and guide plates,double hump fuelie heads port polished big valves flow tested. Other double jointed people can bend their thumbs the wrong way until the tips touch their hands. 461 double hump small block Chevy heads. I am wanting to do a cheap top end build/swap on my 92 chevy TBI 350 to "pep" it up a little. heads are the double >>Notify me. Back in the day, we weren’t thinking of unleaded fuels and hardened exhaust. com, 1955 Chevy 1956 chevy 1957 Chevy Forum , Talk about your 55 chevy 56 chevy 57 chevy - Belair , 210, 150 sedans , Nomads and Trucks, Research, Free Tech Advice > Hi Performance & Racing > Hi Performance: 462 double hump heads. 6 Compatible With Chevy SBC LWP Alternator Bracket Double Hump Heads. Good article Jeff! Back in the early 90s I put a set of "Double Hump" heads on the 283/292 in my son's '66 Nova not thinking about the loss of compression. New and Used Car and Truck Parts and Accessories On Sale Chevy Ii Impala 327 3782461 Double Hump Heads. ground up restoration, need to sell husband passed away, and im moving home, thanks for looking. Chevrolet Head Casting Number Reference Small Blocks 64-66 Double humpers or Camel hump 161/62cc port 327 210 HP Camaro, acc. 06 View Details. 02 double hump heads a edelbrock intake, an edelbrock 850 double pumper, 350 turbo professionally built the car is totally street legal it has 3:55 gears with a 10 bolt the car will run 6. Then, emissions concerns forced lower compression ratios, and there was no need for a high-performance, iron production cylinder head until trucks needed more power in the '90s when the Vortec head was developed. You’ve got to make a decision on scoring points or trying to win the race, and we chose to score stage points and that paid off.