I have a 68 GMC with a 292, split exhaust manifold. I would like to have a reasonably quiet dual exhaust. I've talked to three local muffler shops and they all recommend Flowmaster mufflers or something similar. I had some Flowmaster clones on a V8 dual exhaust once and it wasn't bad but I'm expecting the 6 to be louder. I don't mind a little rumble out the back but I don't want it obnoxiously loud and I want the cab to be as quiet as possible. I can only afford to do this once so I'd like to hear any recommendations and what has worked for other folks. Thanks.
