Have you sonic checked 360 or even 318/340?

He mentioned he had over .300" when he sonic tested before boring. Not sure if he offset bored or what the core was like (if the core shifts towards the thrust side it's good), but he's done a couple of them before. This one was a 72 block. I won't be doing anything to my block without sonic testing - a lot of early 360s are old and abused now.