Looks like I'm down to testing the compression, which will most likely confirm what I know already, that I need to replace the head gaskets. ( classic signs, white smoke) The car heated up pretty bad and I'm more than sure that the heads are warped if not cracked. Can these be machined down or am I looking at replacing them? This is OEM head? aluminum? Can I have it pressed? And if it is cracked or a hair line, can this be sealed?Thanks for the help.