Piston pin bad ?
Good thinking.... I will email him. Hot would make sense.... .015 does not leave much room to grow ! Lol
So I brought the engine to get an unbiased opinion . Here is what is he said.
1).. This was caused my piston damage..( took him 3 seconds to find it!)
He thinks it might be a baseplate screw from a carb....i will check both holleys I used...
It was sitting in #3 hole which was unmarred ! I didnt think to check it closely because it was clean and i had just pulled that head late the night before.