If you must use the rubber or cork end seals, I would find an oil resistant glue and glue them to the manifold, I'd hate to see you mess up that new coating.
My advice is to lay down a 1/4" thick bead across the valley rail of the block (both ends), again let it dry completely, then set the manifold down on it. The RTV should act like a big spongy rubber seal, squash like a pillow when you set the manifold on it. It'll make a nice tight seal. That's how the factory does it these days. Seals the motors up tight as a drum.
Just how slippery IS a greased babies bottom?
cowboy from hell
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