Just for reference, the frame attachment points for the brackets are the same, but the bumper portion is not, so if you were to go ahead and use one type on another you'd have to remove or modify the built-in bumper brackets. I think you can cut or grind off the bumper brackets, and then use your original bumper brackets, as you would on non-factory adapters. 97-up hooks also have a thicker base, and use longer bolts, to clear the plastic skirt, but the earlier ones fit. You may, however, have to cut a notch in the plastic for clearance.