checking for cracked head or bad head gasket..

Isn't this like your 4th set of intake gaskets? I mentioned before that something (Block, heads or intake) has probably been machined so the surface angles are not correct.

Intake gaskets are not rocket science. If you can't get it right in 4 tries something other than the gaskets is wrong.

http://www.youtube.com/watch?v=P_zAXIAdGIg