We found a 1973 Dart Custom 4 door to use as a donor car for my sons 1974 Swinger. We really wanted the interior and to have spare mechanical parts as a back-up. What the 4-door also had was a relatively new dual exhaust system installed. We pulled out the duals and I was worried about them fitting the Swinger but it bolted right up with no issues. We still need to install the tail pipe sections and chrome tips this weekend. Just thought everyone might want to know that the transfer and fitment was easy.