I'm sorry I meant will the intake seal to the heads alright? I've always heard if you surface a lot off the heads,take some off the intake surface of them too,so if you use a gasket that is .020 thinner do you have to do something different for intake gaskets?
I use the mr gasket think gaskets at .028 and I had absolutely no.problem sealing my intake. I would think if you didn't go radical on planing the heads you should be fine. Remember to use rtv in the corners.