I don't know about you all, but I think all these cars and trucks with Flowmasters and similar mufflers all sound alike going down the road. The only difference is the size of the exhaust tips the car/truck is running. With that...
I happen to like the sound of a glasspack muffler. My favorite old-school mufflers are the Smithy's 30" with 2" in/out, and the old Thrush mufflers that were painted black, white, and red and had the "thrush" bird and logo on them. Some turn-down tips out the back for the looks, an "X"-pipe as a crossover (as opposed to an "H" connection"), and the classic sound is there! I'm doing my son's '67 C-10 and my '67 Dodge CSS D-100 in the same way, with Smithy's on both!
The chambered pipe that was used on the '69 Camaro had a righteous sound to it, too!
Any comments? Your favorites? What are you running?