I got the exhaust system installed today. Complete job took about 2 1/2-3 hours at the exhaust shop. I already had the old exhaust completely removed, the BC headers were installed already and my muffler of choice in hand. (Gibson Superflow 758219)
I really like the clean look of the 2-into-1 exhaust system. It keeps all the heat away from fuel lines and wire harness going down the driver's side Frame rail. The Gibson muffler even fit nicely into the original Muffler Heat Shield.
The BC headers are connected to 2 1/2" Pipe on each side. The Gibson muffler has dual 2 1/2" Inlets and One 3" Outlet at stock location. There is NO drone, Popping or crackle at all at any RPM with this system. Just a nice deep V8 sound. It's the 5th one I have had installed. Same exhaust system on a 347, two 351Ws and an AMC 360.
I also had an 02 Bung installed for the Future EFI system.
As you can seen from the pics, the exhaust system is very simple, tucks up really nice (as seen from the side), has plenty of clearance and sounds great. Highly recommended.