72-73 Valiant/Dart Rear Bumper

Guessing (but I have to guess since you don't specify) this is for a '72 Duster or Demon, or a '73 Duster or Dart Sport. The square 2-doors (Swinger/Scamp) and the Dart 4-doors in '72 + '73 use rear bumpers which will interchange with each other if the taillamp assemblies are also swapped, but are not the same as the Duster/Demon/Dart Sport bumpers. The Valiant 4-doors use a totally different bumper.