Ok I see.....off hand on V/P clearance as I remember IN- .070-.090 and EX .100-.120 as recommended. I need to confirm those though....not enough coffee yet. But that's a nice selection of parts you have. As far as the 410 slugs you found you sure on that CR??? Stock 410's from 66-67 were 10.5:1 from the factory??? Also thickness of the head gasket your using? You can run steel shim headgaskets (.018) to help but that 8.2:1 does not seem right.

G.