Choosing the right exhaust help needed.

I bought the TTI pipe kit, back in 1999,for my 68 Barracuda WITH springs moved inboard with the offset kit.
The kit included Dynomax 3 pass; 3 in/3 out muffs and, over the axle and out the back tailpipes with just right turndowns. Still "plenty" of room to thread the pipes thru there.
No boom, no drone, cruises at 65=2240 in overdrive. Only loud when WOT, and is a pleasant loud to all who have been polled.
Friggen 36 pounds of mufflers tho, and another 36 in the full length dual 3s.

BTW: I put no clamps on my stuff, it's all slip fit. The tailpipes are indexed to the mufflers with a long nail dropped in from the top. After the joints soot up, it all stays in place. I use WD40 to penetrate the "seal" when it comes time to drop it the system. The hangers are just tight enough to clamp, but not enough to deform. Leaving about a foot of pipe bolted onto the collectors,it takes a couple of minutes to drop that whole thing. But
---------- seventy two pounds---------------