Results of milling iron heads.

[Ross F-1]

Originally Posted by Ol' Ron

After reading these posts again, I think some of youse guys have missed the point here. I only mill the head to give .050" piston to head clearance. This is usually a .010 at least to .030 at most. ...

I measured clearance to my stock-style pistons (I believe they are Sealed Power) and EAB heads using clay. I don't believe my heads have ever been cut. I'd have to cut quite a bit more than .010 - .030", see below. The valve clearances are after rotating the engine thru two revs.