Get them planed......
Bolt the intake to the exhaust manifold with new gaskets and whatever seperator you want to use. Now take it and have it PLANED. Once you have the intake bolted to the exhaust lay a streight edge over the gasket surface and I will bet that there will be atleast a 1/16" gap between the center of the intake and the #3 & 4 exhaust runners.
Bolt the intake to the exhaust manifold with new gaskets and whatever seperator you want to use. Now take it and have it PLANED. Once you have the intake bolted to the exhaust lay a streight edge over the gasket surface and I will bet that there will be atleast a 1/16" gap between the center of the intake and the #3 & 4 exhaust runners.