Original Over-the-Axle Pipes

Anybody know what a set of original factory over-the-axle exhaust pipes might be worth? These are the ones that leave the mufflers and go to the rear of the car, no tips though. They are from a 71 Demon 340. Seems like they would be hard to find and that someone doing a original resto might want them. Also have an OEM single point distributor, old Accel dual point SB distributors, Carter AFB, Thermoquad, and can probably dig up some other original parts that I am not going to use. Anyone interested???