71 Dart rear leaf spring mounts
Apologies guys- - - - it is the FRONT hangers that I need. I guess this is what I get for relying on my memory. From what I can tell in the parts book (I am certainly no eggspert!), all Dart and Valiant are the same, item code 13-54-4, p/n 2539489, in case this helps. There are no part numbers stamped into the units that I have.