Intake Manifold leaks Coolant- Could it be too small??

Dartswinger70 said

I did use fel pro gaskets and they weren't straight metal...they were blue coated and like said with silicone on the ends and around the water ports at all 4 corners of the heads.

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Thanks DartSwinger and Dicer- For grins I measured the distance between the rails on both manifolds. The Weiland is exactly 1/8" narrower than the cast iron manifold. 7 5/8" vs. 7 3/4". I am now suspicious of the Weiland, as I look closer, the rails have fairly deep scratches running lengthwise on both rails, like someone used very coarse sandpaper or a file on that surface. Definitely not a machined surface.