this must be some extremely rough idle for you to post about it like this.. exactly how rough is it?
could it be motor mounts? - I seriously doubt intake would have anything to do with it
and changing out all those expensive parts.. what the hell. I wish my only problem was rough idle
can't really think of anything -else- that would cause this rough idle.. do you have stock exhaust? check compression on the cylinders?
-- Edited post to be more friendly lol