Only few lifters had 1-3 "holes"(what was that word???crater???), and sized like this dot . not big anyway. I will check the cam from time to time. I Did the heads "myself", I said to the machinist to mill as much as he dares-> almost to zero deck. And the pistons are flat tops and they exist far, far away down the cylinder :) Doublechecked that CR!JoeDust451 said