69 Dart exhaust tip and hanger questions

My 69 Dart had a square slot to the rear a few inches from where you show your hanger mounted. That slot had a 'clip" that is sorta like a fender clip with the threads made into the clip to thread the mounting bolt into to hold it in place. But I use the factory exhaust tips and that's how the factory did it. You're using non exhaust tip style tailpipes. But those should work okay.