I had a 216 head milled by an old timer 30 years ago. He took just enough off to make it flat. He warned against milling too much off, as even if you don't end up with intake valve contacting the piston, you can still cause poor airflow at the intake valve from lack of quench area from too much milling in that area.
He mentioned that when he was into racing these engines, he would mill them on an angle, taking nearly most of the metal from the exhaust side of the head, resulting in leaving the intake side of the head mostly unmolested. He said that the valve train still worked fine and the difference in the head height could be taken care of since there are enough threads on the rocker arm adjusters to set the valve clearance. I wish I would have asked him what angle he used. I would also like to know what he ended up with in terms of reduced cc's of the combustion chamber and the resulting change in compression.
Hmmm, if I only new a guy who had the machinery, knowledge and the time to experiment with a project like this...
Carl
