Exhaust swap from 4 door to 2 door...
Its a direct swap hangers and all both are 111" w.b cars, theres no difference in wheelbase between 2&4 doors if they are the same model except a Scamp which is a Dart with a Valiant nose.
67-76 Darts and 70+ Scamps are 111" -- Valiants, A-cudas, duster/demons are 108"