I have a 70 360 block I bought off a circle track racer it was his spare that he never used, its now .030" over with a half fill, pro-gram 2 bolt caps with ARP studs,the block was completely squared up,sonic tested we could have gone .060"-.070" over, this was the second block we tested first one had bad core shift it was also newer.
4.125" stroke X 4.030" bore= 420" with 59 deg W9 Heads.
Best Machine did all the machine work and assembly, we started out to build a nice mild 4" Stroke street motor and got carried away.

If I was to do this again it would be 48 deg R3 and full on W8 or W9