If you have a good muffler shop in your area, do what Marty suggests. I live in a small city area and cannot find anyone who can/will make a useful exhaust system for my trucks (even shops that work on race cars).
I ended up buying a beautifully made polished stainless system from Patrick's ($$$). The muffler is a little loud for my tastes but the fit from front-to-back is perfect.
It looks like
Chevs of the 40s might be selling Patrick's system?
