72 bumper on a 74 HELP!!!??

Im putting 72 bumpers/front clip on my 74 duster. I finally got the old bumpers off this afternoon and went to mock up my 72 bumpers and brackets. Im having issues with it... Its obvious that the outer brackets do not have a mounting hole and the inner holes on the main brackets appear to be where the shock goes through. But on the sides of the bumper it looks like its too far from the body.

Has anyone done this before and shed some light on this???