360, You think it'll run on pump gas?!?!

I don,t understand why some guys mill the crap out of the heads and then have to use a thick head gasket. A .003"-.005" clean up cut is all that is necessary using a .022" head gasket. Both MP and Cometic make a .022" head gasket. the Cometic has an advantage of having layers. That means it can be used with alloy heads. Our '66 'Cuda runs 11:31 @ 117m.p.h. and is 100% street legal. We use C10 only at the track. To solve your issue using your setup, use the thick gasket. Good luck