Manifold doesn't line up

RustyRatRod said

Those heads have been milled on the intake face.

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That's what I thought, but then why does the iron manifold line up?

I think milling the manifold would make it worse, right?

I wondered if the heads were milled to bring the compression up, but again, why does the iron manifold line up???

OP: can you borrow another aluminum 4bbl manifold to try? Is the Weiand manifold new?