I have to admit Craig, I was expecting a very different story!
I could bring my car over with the gutted G2 sport muffler and we could investigate the harmonic differences between a 3.4 twin plug, a carb'd 2.7 with an M&K muffler, and a 3.2 with a cat bypass and virtually no muffler. That ought to be enough to give the old bat a heart attack!