Intake Manifold Question

[RPinoski1]

I forgot to mention it is a SBC Super Stock engine in the opening post..........

The heads are CC'd and on the engine so we can't touch the head surfaces. The angles between the two surfaces are correct and the front and rear are not touching. The problem is without gaskets the "Victor" manifold sits up too high for the intake ports to line up correctly and the bolt holes have already been enlarged for better alignment. The gasket is a Mr Gasket 101G. It seems everything in the books refers to the head surface removal nothing refers to the deck surface removal.

So I was wondering if someone had "a rule of thumb way" to know how much to shave off the intake if you knew how much you took off the deck? Again the angles between the two surfaces are perfect. I just need to lower the intake so the tops of the ports will line up again.
Before the freshen up everything was port matched and lined up perfect. With the new pistons we had to lower the deck .050. to get the correct piston to head clearence.

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