"...with the #16 small valve heads and bored 30 over I would be working down from somewhere near 10.5 in order to get to pump gas.
Looks like the #16 heads had 78cc chambers. That won't get anywhere close to 10.5 CR, on a .030 over 350. I plugged in some numbers & get just over 9:1 CR. It depends on the EXACT size of the chambers, head gasket used, valve reliefs of pistons used, final deck height, etc.
