Thread: 400 small block !!!!! having some head issues and need some advice

Tweet

both heads look to be 76 cc so if engine was rebuilt one head could of been crack so then other casting would be put to use . this is a common deal long as valves size is matched not to big of a deal. i just did two sets of boat engine one had busted heads so i mached with head chamber cc and valves size . casting numbers told me the new heads for the engine were same valve and cc . some heads came with 3/8 ex stem but will work fine gm over the years cut the casting weight by the out side of the head is more scalped out and more open deck . but if all size i posted engine just will not know