rear bumper 74

in f/u of prev thread, I have a 74 dart swinger and hate the bumpers, I have shifted the front bumper back w the brackets redrilled. the rear bumper is another issue, has anyone put a 70-73 bumper on 74? does anyone have a photo of a bare rear of 70-73 so I can see how the bumper mounts? I am also looking for a core rear valence, bumper, bracket and qtr extensions if anyone has hanging around. it is trial thing so don;t want to spend a bunch on a guess but am reasonable. thx, cant wait to post some photos, art