The 72 grill will not have the screw holes for the bumper filler strip that was used on the 73-74 models. I think 73-74 model year front bumper brackets had 3 bolt holes in each front frame rail. My 72 has 2 threaded holes in the front frame rails for the bumper brackets. Also the 73-74 cars had screw holes in the body by the tail light panel for the rear bumper filler to be attached with.