I think you can just add the bumberettes from a 72 to your car all you would need is the plastic that fills in the space between the valance and the bumperette. My friend has a 73 cuda which has the big rubber bumper guards and he just took them off and put the 72 guards on with no problem. As for the front I think Chryco is right just put bumper bolts in the holes, I think that is what you meant Chryco? It would work.