Help with 340 compression + cam change

midnight340 said
Just found this from FOABO post:
"72-73 piston sits 0.054 below the block deck" so with my decks surfaced .015", 70cc heads, .040 gasket, and allowing 8cc for valve reliefs, running the Wallace calculator I come up with 8.44 compression. So that's probably close???

Probably so, yes. But don't put a lot of worry in that. Low compression motors can be made to RUN. With 160 PSI, you have a LOT to work with. Have you recurved the distributor? That can make a REAL difference.