HELP!! with my 75 Dart

FYI,that one was kinked above the rear end in the bend above the axle. It had pulled away from the exhaust tip, but the tip hadn't moved so I didn't notice it. Run your hand up and around, was hard to see from just crawling underneath and eyeballing it.
Ok..cool..thanks for the info.. I also know that temporarily plugging the exhaust with like a sock or ? Will make the leak or?more noticeable.