Is it normal for the a 3.5 Bwoodys intake to make a whistling noise when first crack the throttle? It doesnt do it in park, only under load and only when you first crack the throttle or are cruising just barely touching the gas. Not sure if its normal or if i might some kind of vacume leak. I also installed a Billet technologies catch can the same day and wondered if that might have something to do with it.
sounds like you have a leak? Double check all clamps and ensure that the tubes/hoses are sitting even and flush... Oh, and welcome to the "C"