Rear bumper question

Can you retrofit the 70-73 Duster rear bumper to fit on the 74-76 Duster? I like the look of the smaller ones but wonder if the bumper will sit and mount ok on the later Dusters. I have the earlier brackets and a nice clean one ready to go but I don't want to take my old one off if it wont work. Thanks for any help mopar brothers and sisters.