Getting ready to buy systems for my '71 Lemans and my '86 GN. I'm getting Pypes for the Lemans for sure, just wondering if anyone has put the Pypes cat back system on their TR. The Pypes part number for the G-body exhaust is SGG50 and the test pipe is PVC10S, but the sales guy wrote back and said the test pipe may not fit the GN, only a Monte? I thought the Monte used the same location for the cat and same converter/bolt pattern?