Milling Intake to fit new engine

I see this all the time, shops milling away but never correcting the intake face.
I have the same problem with my 344, but at least I had a milled weiand sp sitting around [for 10yrs] that I finally got to use once I found what they DIDN'T do.

If aint been fired/installed in the car MILL THE INTAKE FACE OF THE HEADS.
Don't make that rare intake a one off piece.