360 sound good still?

The 71 block was a thick wall casting that can usually be bored safely to .060. Maybe more. This is a great engine to build. Most 72 blocks are thick wall also. I've heard some rebuilders say they have seen late 72's that were thin wall casting. These can only be bored to .030 usually. But every block should be sonic checked before boring much just to make sure it don't have any thin spots.