I've been looking at the options for head gaskets at SummitRacing.
Fel Pro # 1105 has a 4.590 bore, .051 thickness and a 13.7 cc. It moves my compression to 10.36. Cometic # .051 has a 4.380 bore, a .051 thickness and a 12.59 cc. I get a 10.47 CR there.
Cometic # 5464-075 has a 4.5 bore, is .075 thick and a 19.55 cc. It drops the compression to 9.89! That would surely allow some wiggle room for even running 89 octane gas! When I ran the .060 Cometics before, I was told I'd have intake gasket alignment issues. Luckily, I did not. These .075 Cometics are .015 thicker. If I decide to go this route again, WHO makes a thicker paper intake gasket? The Fel Pro ones are pretty thin.
