You should raise and support the vehicle, remove the tire and wheel, the automatic level control link from the upper control arm, the brake pipe bracket retaining nuts, and the brake pipe bracket from the mounting studs, support the lower control arm, remove the trailing link to knuckle nut, the trailing link to knuckle bolt and the jack, support the frame with a suitable jack, remove the front bolts from the frame, lower the front of the rear frame and remove the trailing link to frame nut, the trailing link to frame bolt and the trailing link from the vehicle.