I filled the engine up with coolent the othey day and i had a leak on the drivers side head.the engine has had a valve job, heads milled .025.when i assembled the engine i torqued them once to #75 .after the leak showed up i retorqued to #90 it slowed down but still leaked some.i took the heads off and checked for flatness and they are ok.i miked the gasket as the hoosier man suggested.the fire ring was .o52 and the outer part of the gasket is .045.so it looks like the ring isnt compressing enough.the head bolts arnt bottoming out and the guide pins have enough clearance,also the two long bolts are in the outer holes.i talked to john murmmert about the gaskets and he said they havent had a problem with best gaskets.he will probably replace them but i am a little leary about trying them again.has anyone else had this problem ,i have thought about using fel pro gaskets.any advice would be greatly appreciated  Carl   ohio