Captainkirk's Duster project

Did you actually measure your "J" heads, a set I just had re-done they were 74cc's.
Yes. I had them cc-checked by the same shop several years prior.

EDIT: Just checked my notes and it appears the shop only cc'd one chamber on one head. However, the first time I had this engine built, I paid to have the heads cc'd, so I can generalize that they "should" all be within 1cc of each other. If I go with having these heads done I will ask them to confirm all chamber cc's.