Thanks for the extra info. I will look into locking out the distributor, and installing an MSD Start/Retard Control. I think that would help me a lot. I don't really want to make any expensive changes to the engine unless I absolutely have to. I rebuilt it when I was in my 20s, now I'm in my 60s and I don't want to tear down the motor again. I just want to enjoy it as is, if possible. Good question about the pistons. IIRC, they are stock, so kinda dished, but when I installed the new cam it was recommended to notch the pistons to ensure valve clearance, so that's what I did. Sorry, I never cc'd the heads or measured the deck height. I would love to do some upgrades like aluminum heads, forged pistons/rods/crank. But I already emptied the piggy bank buying the Tremec, and I'm saving up to buy paint for the body, so unless Jan gets tired of the motor in his car, and wants to give it to me, other performance goodies will have to wait.