Over bore: How far is too much ?

I have a question, regarding a 360 build up. The engine casting date is
12-4-75. Basically a 1976 engine.
I've heard that a 360 engine after 1974, has a thinner cylinder bore, and should only be bored .030 over. I'm considering a purchase of a 360 build with a .060 over bore.

Does anyone have any experience with a 360 bored .060 over ?
My plan is to race. The engine will be coupled to a 727 transmission and a
8 1/4 rearend.

PS. I may have placed my last thread in the wrong forum#-o