Here are a couple pics from the underside of those 2 cars when finished. Both were running 2.5" dual exhaust with balance tubes. Nova was right to the rear quarters tucked up high, and the Camaro had duals that dumped at the axle for deeper sound. The hookers are quiet with no drone when you run the tails right out to the back.
Nova Undercarriage / Turbo Mufflers
Camaro Undercarriage / Aero Chamber Mufflers