I have seen recommendations to use high heat epoxy. JB Weld has a version and that is what I used on my KRE heads.
Once cured, I sanded it smooth and flush with the head then a coat of epoxy primer then paint.
Engine was only run on the stand so no long term feedback from me.
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Michael
1970 Oshawa built 1 option Judge. 24 year restoration/upgrade project finally finished!
1979 Trans Am - low-buck drag car project for when I retire
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