Missed on this combo?

Well, thought about hauling one to the guy who flowed my Eddys. It's an hour and a half drive, another 75 bucks, and the dude ain't real helpful other than writing the numbers down.

I know damn well these are way better heads. No way no how they are not going to make more power. At least better torque. Even I can see that just by looking.

Anyone know the rule of thumb for milling closed chambers? I need to lose about 4cc's.