Junkyard 5.9L Magnum + Edelbrock LA heads build

Today I went to install the intake manifold and got pretty annoyed, it's going to need to be milled. The bolt holes barely lined up with no intake gaskets, now with the .060" Fel-Pros it's not even close. I spent 30+ minutes trying to get it pushed down just enough to get the bolts started but there's no way...

How much do you think I should have it milled? .010" per side, or more?

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