Here is a shot of my RPM intake to RPM heads that needed to be cut .070 it sit just right. The same amount was taken off the bottom where it meets the China wall.
I hate to say this, but I don’t remember how much the heads were milled exactly. IIRC, (and that’s bad in this case) the heads were milled down to remove 3 - 5cc. Then on top of the milled block, how much I don’t remember again (sigh, I know, paper work is in a box somewhere. I’m in the middle of moving to a new state)
And then there is the head gasket thickness. All of these altered Dimensions add up and throw everything out of wack. As mentioned above, (Thanks quickbpbp) the shrinking “V” becomes an issue as well. Hence the intake to head face milling that is a must and then the core and aft, then the angle of which it sits on.
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