. . . Still undecided on which heads to use. As I remember the 061's have a cleaner/smoother combustion chamber than the 62's. I'll have to pull them back off to look again. They are supposed to be the same cc (72) or close. The 62's are bare, no valves etc. No work done yet to either set. I'm wondering if octane booster on super unlead would help at this comp. ratio ?
