Early 360

70aarcuda said
I have an early 360 bored to .070 over also...

It was a cheap way to build a 372-373
I had so much good luck with a .060 over 340 which comes to a 4.100 bore I felt a .070 over 360 at 4.070 was possible after sonic testing it.
Did you have any sign of it trying to overheat ever?