Don't use replacement type steel intake gaskets with an aluminum intake. Use composite type gaskets only, such as the Superformance gaskets, or from Mancini,Summit etc. and don't use the end gaskets. I don't think you have water coming out of the valve covers or your oil pan would be full of water. You are probably getting a spray out of the intake and running around the valve covers.
Felpro intake manifold gaskets with with Gaskacich and Permatex ultra silver on the ends. Water drops inside of the valve cover.
