Pypes A body exhaust or Summit Which one should I choose?

Cant speak for the pypes system but I have the summit kit on my 72 duster and it is a great set up .....very happy with that purchase.

sounds awesome too!

only thing I will probably change is I will upgrade to a welded chambered set of mufflers eventually....the ones they summit includes in the kit are just a tad too quite than I PERSONALLY like.