I have a set of the CNC'd Speedmaster heads. I cc'd the chamber and came up with 75 cc's. Seems a bit big but I'm sure of my measurement. Anyone else cc'd their heads yet?
I cc'd my chambers again and got 68 cc's. The chamber is CNC as well as the ports. I found out why I got 75 cc's on when I did it the first time. The fluid I was using was leaking past the exhaust valve. WTF! For the 2nd time I sealed the valve seat with vasoline and got the 68 cc's for CNC's chamber.