Picking an Exhaust and Mufflers

Hey guys, so work is being conducted on my '68 Dart. The drivetrain that's going in is a 360 engine with a Paxton Supercharger, a T56 manual transmission, and TTI shorty headers. I have a couple questions...

1) Has anyone fit TTI's exhaust on an A-body with a T56?
2) Are there any other good muffler options besides the Dynomax Super Turbo's? Don't get me wrong, I like the sound, but I'm curious as to what else is out there. The shop working on my Dart has a connection with Magnaflow's if that's a good option?
3) H or X? I know... loaded question.

The car will be used primarily for autocrossing but will have its fair share of driving to cruises and events. I'm looking for something that will be bearable inside the car so that if I had a passenger we would be able to have a somewhat normal conversation without yelling at each other, but a nice roar at WOT or when you start to get on the pedal. The car should have quite above 400 at the crank so I'm thinking a 3" exhaust may be needed. I've listened to all the sound clips in the sound clip thread and I'm not particularly a fan of Flowmasters.

Thanks for all your help! :blob: