The Teraflex truss relocates the upper control arm mounts. We had to modify the truss and attachment system to work with our axle. The bracket in-hand is designed to bolt to the truss and then bolt to the differential cover bolts of your Dana axle. With the F9 housing, the bolts are on the other side, so we cut some 1/4-inch-thick plate to fit and then burned the truss home. It was another half day to get the truss modified and the 1/4-inch plate cut and welded. Plan your time accordingly if you have a non-stock axle.