I guess what iam trying to say is I can take the same fixture and dust the head surface. on a machine, I should be able to mount the cylinders in the fixture and take them to a grant table and see how much the head surface is out of flat. The fixture is flat and parallel to . 0002 Will have to hand lap the heads.My motor man thinks iam going to extremes?? I think iam doing it right? need help?