Help-blown head gasket? 67 FE Mustang I think I have a bad head gasket. Here's what is happening:
Starts up normally, runs well for about 15 minutes then it starts to run rough, almost like an ignition miss. I've gone through the ignition system and everything seems ok.
Temperature guage remains normal I don't see any white smoke out of the tail pipes. It's not losing anti-freeze.
I'm going to do a compression check on it. Anything ideas on what else to check before I pull the heads? Thanks