Bigblock chevies, at least the MarkIV which are the original 396s, 427s and 454s, could usually go 0.125 over with no problem. I'm not sure about the 402s, because they might have been built on the 396 cores but bored out a little.

On the other hand 400 and smaller ford engines are quite thin in the walls, at least in the Cleveland and 335 families, and on many they were done at 0.030 over.

The 385 family, 429 and 460s, had thicker walls and blocks were quite stout.

R.