DIY Exhaust Extending
Look around the net for exhaust systems, tail pipes specificly.
Flow Master sells a universal exhaust kit for over the axle and maybe for the A body car. I know the have over the axle pipes for the B body.
The universal kits have a multi peice pipe set that you cut to fit and then you can clamp it or weld it. I've used these twice before. Just don't fit the kit with the car on jackstands. Keep the car on the floor or the rear tires on a ramp.