How much did you have shaved off the heads, because if it's to much you have to mill the intake to sit lower as the heads are lower now. And the big indicator of your problem was the intake having a sealing problem. Most likely your water crossover is leaking straight into the lifter galley.
I didn't have the heads milled, they were done before I bought them. The previous owner didn't know how much they had been cut, either.
They are 'X' heads (894) with 64cc chambers. Stock they were 70-72, I think.
From what I remember it was 1cc for every .005 milled off, does that sound right? If that's the case these were milled .030-.040. And I don't think the intake face was milled at all, just the deck.
