The above pics are from the 72’ FSM and show the components of the 72’ Road Runner grille layout. Couldn’t find one for the one piece Satellite grille in the FSM, did find this one in the 72’ parts catalog. The three grille brackets for the 72’ Sat grille are different from the 72’ RR, but should be the same for the 71’ Sat, RR, and GTX. They do use the same mounting points on the bumper. The four brackets that the headlight bezels mount to, do appear to be the same on all models for both years. I don’t have any pictures of the assembled back side at this time, however in the next few weeks I will be removing my RR bumper, in preparation for final paint, I’ll take some pics at that time.
The bumper brackets should the same for both years, all models.