Intake manifold oil leak

69dart340 said

When I had oil there it was from the valve covers not sealing. Your valve covers may be hitting the intake manifold runners.
If they are you need to grind the gasket lip on them a bit so the valve covers can sit down tight on the heads and/or get a thicker valve cover gasket.

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X2. I had exact problem after I put new gaskets that were a little thinner. Had to grind the valve cover lip.

Also, be sure the head surface has no gasket residual (gasket scraper)

Finally, some of the Mopar Performance valve cover have casting marks on the underside where the gasket seats. Need to Dremmel those smooth as well.