Are you sure that is a 72 bumper? I don't see the slots for the bumper jack. I also have a 74 and installed a 73 rear bumper. you will have to modify the brackets to attach them to the rear frame, also the lower rear quarters must have about a 1 inch extension put in place to fill the gap between the bumper and quarter.
It can be done, just takes minor mods. Sorry I do not have pictures.
