Thanks Däs Schmoo. I know it's not the ideal way to lower compression but since I'm in CA, I needed to lower my c/r to be streetable on 91 and also to pass smog (which it did). I had my motor bult in 99 so their was some misinformation back then about the c/r with pct pistons and a b17a motor (negative deck height). If I knew this, I would of ran some p30s or pr3's instead. So you think every 0.012 on a thicker gasket add 1 degree advance? Thanks again for your help.

1.7na