The compression issue was a carryover from the previous direction of going back to bracket racing my street car. 93 octane is everywhere in the Houston area and I figured that between it and the 258@50 cam I was going to run, it would work out. now thats kind of a liability as cross-country, it can be hard to get even 90 some places. I need to do the calc to see how much comp I will lose by gouing to a .051 headgasket compaired to the old .039. It won't be much though.