David,
        I'd get a new intake/exhaust gasket and use a product called Hylomar 
around 
both sides of the intake ports on the gasket using a small even coating.  
Hylomar is available at the usuall auto parts stores.  Also allows the 
gasket to be removed at a later time with out tearing.  Using two gaskets 
would only help if the manifold is warped.  After removing it, put a 
straight edge across the face to see just how even it is.  If way off, take 
it to a auto machine shop and have them true it.
Bob
>I have tightened the hell out of the manifold nuts to no avail.  Will it 
>help
>to use two (2) intake manifolds back to back?  There is no sealant I know 
>of
>you could use in there due to the heat.  Is there?  The engine is a 1500.
>
>--David C.
>
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