360 bore

Sounds like a .030 with some wear. Need to check down in the bore in the ring travel area w a bore gauge. Thrush side tends to wear a little more. Could be .010 or more out. Just measuring top of bore don't tell you all you need to know, need to measure throughout. I had a std bore 340 that measured 4.043 or so at the top with a dial indicator. It needed to be bored .040 to true it up because it was wearing at bottom of cylinder on thrush side.