340 with edelbrock heads overheating

Early a body said

ok, got the heads checked out. They were both bowed. He had to take out .6000 off each head. Keep in mind the heads never got hotter than 215 or so based on my ir gun. so it may have been warped heads the entire time. not sure how much these heads can take in terms of heat but this was a very interesting development.

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I’m guessing you really mean .060 off because .600 is damn near 5/8 inch.

I’ve seen heads move that far without getting too hot. If the fasteners get a bit loose (this was a big deal in the 1980’s when everyone and their mother was making composite gaskets that needed to be to retorqued at least twice stay tight (if you were lucky).

Once the fasteners got loose the head would bow up right quick and the poop fest was off and running.