I wonder why they didnt go ahead and drill the cross bolts on #5 specially since its prepped for it.. but at least there is a STRONG block for the BB guys... my mega block with 4.5 bores only had .200 walls at the thinnest point.. whats the next ring size over a 4.5.. does chevy have a 4.6 ring
4.6 is a common BBC size. The biggest bore I have seen for a 4.84 bore space was 4.605. I believe that the Dart block can go 4.625 at 4.84 bore space.