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.
S10 350 492 double hump heads YouTube
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?
