The engine is a stock 350 4 bolt main out of a 68 camaro. I am adding 461 double hump heads a edelbrock performer rpm cam (234/244 dur @.050,.488/.510 lift), edelbrock. Check out the details, modifications, and tests we run on.
Rebuilt 1975 Chevy 350 4 Barrel, Double Hump Heads, Engine Motor w
The double hump chevy heads first appeared between the 1960s and 1970s;
Well, that depends on a few factors, including the engine displacement, the camshafts, and the type of exhaust system you.
If the heads have the little x near the front or rear underneath, they are generally worth more than the non x heads. To double hump heads are thinking the 300 hp smaller valve heads, or at least i do. They are decent street heads and were top shelf when they made their debut 45 years ago. There is no real difinitive way to tell what they came on.
The x heads were the first design fi heads in 61. But how much hp does a double hump head add? 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.040 ,if not ,you will have detonation. Your heads are the 350hp heads with the larger valves.
Will double hump heads (casting 3917291) fit on a 1971 small block chevy 350?
