My stock stroke 340 is .040 over and runs great. Sonic check is the only way to know how thick the cylinder walls are. Personally I would run an old 340 block with a sleeve over a later year 360 block.
In order to convolute this thread further we could discuss the rod to stroke ratios and how that impacts cylinder side loading. Just another reason why I prefer stock or short strokes. LOL J.Rob
