Early A Body HP 273 exhaust

Is there anyone out there that has used the HP 273 exhaust kit for early A Bodies that is made by Accurate LTD? I like the idea of using the stock manifolds and having a 2 1/2" inlet muffler and 2 1/4" tail pipe. The exhaust on my 66 Dart must be from a 273 2bbl. because all the pipes are 2" or less.
I know that good headers and a free flowing dual exhaust system is good for max. performance but I want to keep mine close to stock. Mike