Besides the bracket being different, the mounting to the stake pocket is totally different. The bumper truck does not use both of the holes that are in line with the hinge. The bracket mounts on the back side of the stake pocket and uses the upper hinge hole and another hole up higher that you must add. This positions the tailight back futher since the bumper protects it and raises the light and license plate to clear the bumper.
Been there , done that
Floyd