Engine milling maths

No, sir. I don't think you have it right.
By milling both faces, yes, any intake will fit. That is a good thing. Putting heads on a different block isn't a problem either because.....any intake will fit. "jacked up" ??? WTF is that?
Are you feeling okay? Been drinking tonight ?

Doing it your way, the intake is now only a direct fit to the milled heads.
Doing it the right way, every intake fits not only the milled heads but ALL other heads.
Try some humility sometime. Being so sure of yourself sets you up to look foolish when you are proven wrong.
I'll add that if you use a thicker intake gasket...the cut intake could work on other blocks as well. Thing is if you measure and cut based off the thinner gasket... you will have more room for gasket compensating for the gap...cause it will be less now to start. I'd still rather cut the heads intake face once going beyond about .045
Consider if the motor came with a .020 shim.. then you mill .045...but then add a .046 8553PT... though the compression went up and the chamber got smaller by 8cc... the intake alignment only changed by, what... .021?