'75-'77 models have the hump on the passenger-side floor to accommodate a single cat. The '70-'74 models do not have this. Tail pipes fit just fine outboard of the rear leaf springs. No need to run them straight out the back...
Count me in on a completely stock '72 V8 Single Exhaust setup. I want to have the factory spec muffler too, which should be pretty quiet. (If I wanted a "sporty" sounding muffler I'd just go ahead and do full dual exhaust, because at that point there's no reason not to) But 100% OEM would be great to have!
