Tim, like MHoward mentioned, I`d be looking at the fit of the lower intake manifold. Between decking the block, and milling the heads, the fit of the intake can get way out of whack pretty easily.I`d try fitting the intake on the heads without any gaskets, and check to see that things are parallel at the sides of the intake where it meets the heads. You may very well need to cut the manifold to make things fit. Also, you will likely want to run a soft Mr Gasket type intake gasket, rather than the hard, ridged stock style gaskets. Good luck!
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