318 budget build

nm9stheham said
Even if the the pistons are .040" in the hole, it is 8.7 with those head gaskets and head chamber volume. And the .040" in the hole is not normal.. So I think this is 'optimistic' on the SCR; , mid-8's at best is more like it. I'd put in the .028" thick head gaskets if you can but not a deal killer.

Yup .040 in the hole flat tops I have already took apart to pairs of stock heads cc d them both came at 64cc both motors were 0.040 in the hole. One motor was a 90 and the other 89. Roller motors had taller pistons.