74 Duster Body Question

the car I am currently building is a 74 and I changed it over to "look" like a 70-71- 72...the front fenders (needed for grille brackets ),grille,bumper/mounts , hood...all bolt ons ...no muss--no fuss...if you want to do the rear...it takes a little surgury to replace the now available tail/tail lights(I did it w/70 panel from wrecked donor ) for the rear bumper I simply discarded the rather wide and heavy rear bumper and shock absorbing mounts...plated over the hole where the shock stuff went and bolted up 72 rear bumper brackets and bumper...shazaaaam!!!