Shaved Heads/Intake

Quick question and I already did some searching for the answer.

I have 360 with heads shaved .040 and the intake is a pain to get on. Going to take the intake off to inspect lifters and measure actual pushrod length. Since it'll be off does anyone know how much I should shave my intake manifold to compensate for the heads being milled that much?

Mines the closer one. Thanks in advance!