Slow, Driving Rustoration 1972 Dart

Google exhaust shops in the area Meinike, midas, etc and price a custom bent dual exhaust. By the time you buy a muffler and tailpipe and try to crawl around under it and attach it to a used "y" pipe with hand tools in a parking lot, the price of a good custom system might seem pretty reasonable (especially if you factor in the added fuel economy of duals)