Anybody body using this set up with a spacer that doesn't leak and has a PCV port? I am looking for 1" spacer with PCV port that matches holes on a 4100 and weiand intake. I heard I could have a leak problem if I don't get the correct spacer. So, far, I've come up with the Boss 302 spacer which is, if not mistaken, made out of plastic??? Am I correct on this one?