Originally Posted by Hotrod Lincoln
........ I like 2 1/2" exhaust pipes and Cadillac mufflers with both inlet and outlet pipes the same size. One muffler can handle a 500 cubic inch Caddy engine, and dual pipes with those mufflers are quiet, and act like straight pipes where back pressure is concerned when paired up with a 350 engine.
Jerry

Jerry, What years are those mufflers used. I remember reading of that years ago in HotRod or the like.