Dual exhaust .... What are you running

When I was younger I ran headmann headers with Toruque tech 2.5 inch out the back. I have since switched to factory 68-71 340 manifolds an 1 /7/8 accurate exhaust with factory style mufflers. I started out wanting to drive the car and have ended up wanting to restore it as far back to original as possible including a standard bore 340

I seem to think Torque tech is out of business...they were out of Georgia.