Does anyone else have a Gurggling Noise coming from under the hood, with a Crawford V5 plenum, is that natural for this plenum or should i be concerned. In neutral if you raise the tach between 2K and 3K it makes a Gurrgling V8 67 Cuda kind of sound. Or describe the sound you guys are getting from you v5 plenum, cause I don't know if my description is any good. Thanks!