[swb85]

Originally Posted by djmachinist

I read your 383 build, nice engine!! You are getting that kind of miledge out of that combination, Wow!!!

Ok, After reading your 383 build, I have a plan of action:

First, I called Fel Pro and explained the problem and they suggested their Head Gasket #Z1144061 Head gasket that is 0.061 in. thick. This will bring down the Stactic CR to 10.3 to 1. Second I'm going with the the same cam you used in your 383 build, Comp cams # XR282HR. That should bring down the Dynamic CR to something reasonable. The timing should be able go up to 32 deg. or so with no problem. What do You think?

Thanks,
Dale

DO NOT change to a thicker head gasket, that will make the motor even more prone to detonation. You want to leave the head gasket alone, as it sits you've got a respectable .043" quench distance. You don't want to go any wider. The only way to correctly change static compression is either change pistons or make the combustion chamber in the heads bigger.

You've got a half point more static compression than me so you may need more cam to get your DCR down to pump gas territory, but you've got aluminum heads and 93 pump gas (we only have 91 here).....so you may be able to get away with a little more squeeze than I can.