The 1970 Challenger rear valance pan used 6 separate brackets to mount it. It mounted on the sides to the quarter panels at the same points all Challenger rear valance panels do. Under the bumper brackets two small brackets were used on many, but not all, 70 Challengers. They mounted to the top edge of the pan. Toward the center, on the back of either side of the license tag location two other long brackets were used. The 71 through 74 Challenger rear pan used a center mounting bracket only. In 1973 rear bumpers were moved out from the body to comply with Government impact regulations. When this was done the license tag light in the bumper no longer shined on the license tag. An extension was added to the rear valance to move the tag back into alignment with the tag light.