Head gasket getting oval?
WWW.scegaskets.com has some great tech and info on head gaskets and sealing issues.
I run ProCopper gaskets with my heads O-Ringed and receiver grooves cut into the block.
Most copper head gaskets require O-Rings.
SCE ICS Titan line of head gaskets have an Integral Combustion Seal (ICS) and sealant on the coolant passages. You might want to check out their part #S69064. 4.060 bore and .043 compressed thickness
No machining for O-Rings are required .