Edelbrock rpm head question

They're decent heads. Like any aftermarket head, have them checked and corrected before you bolt them on. You will need the right head bolts, and you need to run a "pre-flattened" head gasket to avoid brinneling the heads over time.

67 - To answer your question, the vast majority of tech guys who answer the phones will tell you "don't" becasue the static ratio is high. You can, but it all depends on the build and how it's all put together. For the majority of mild to medium builds, I use a dished piston and .040 is quench with a smaller (60cc) chamber so the static is really "set" by the size of the chamber. This yields around 10.8:1 static that will run well on pump 89 fuel with milder cams. If this was a more race oriented build I'd run flat tops and tighter quench but the cam would bleed off some pressure. This means 93 octane minimum and a static closer to 12.5:1. It's all about the package. Not parts individually.