Edelbrock RPM Head compatability issues.

The 60179 heads have slightly larger chambers - and were introduced because Edelbrock failed to anticipate how many guys were out there still running factory pistons that protruded slightly above the deck and this created some clearance issues on the original offerings which were P/N 6077 - which have now become P/N 60779. Unless I somehow missed it, you don't really state which P/N you won on e-bag. In either case, as long as you build a true flat top engine you'll have no clearance issues and I think there's only about 2 cc's of combustion chamber volume difference between the two part numbers anyway.

Stamped steel rockers don't know if they're off of a 340 or a 318 - all the same. Run them until you can pony up for some good ones.

Ray