69 Charger 440. Finally got the beast running, but I don't like the "motor boat" sound coming from the exhaust https://app.photobucket.com/u/stump...941f16/p/fdc4576c-e08d-4004-b8e4-7f9c90e01cf1. The entire exhaust is "new" as in never exposed to the elements and always garaged since installed new. The heat riser is just loosey goosey, but I have it tied off counter clockwise to always be open. I just starting using Rec 90 ethanol free gas. Still tuning the carb since I rebuilt it so haven't road tested yet. What do you think?