My brother in law is building a 70 ''cuda using a drive drive out of his old mud truck. He put the motor in and fired it up and heard a bit of noise. This prompted him into gettingg a set of eddy heads . While apart he decided to measure everything and was disappointed to learn he did not have a striker motor like he was previously led to believe from the original owner. Anyway, he found part # 3690835 on the pistons. He believes these are Direct Connection/TRW .60 over forged pistons. I was hoping someone here might be able to tell us what the CC dome size volume is.