Feets , I could buy this logic and may try it, however great lengths were followed to restor it to pretty much OE correct with the cam, gear ratio, and exhaust essentially being the only deviations. I may just cave and do an oem style muffler to retain more of its 'authenticity'

BSB67. I think I'm leaning towards this (your recommendation) solution. My car is a non A/C post 69 runner, so what ever they weigh, I think 3300lbs?? With 3.91 gears and 4 spd. It is loudest or the most drone is between 1750-2000 rpm.

What mufflers have you used that represent a 'stock' solution, Accurate? Or other?