To remove the lower control arm, first loosen the wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands before removing the wheel. Support the lower control arm with a floor jack, then disconnect the stabilizer bar and the shock absorber from the lower arm. Remove the torsion bar and the floor jack, followed by disconnecting the balljoint from the steering knuckle. Remove the lower arm pivot bolt nuts and washers, detach the lower control arm from the frame brackets by removing the front and rear pivot bolts and nuts, and then pull out the bolts, using a hammer and drift punch if necessary. Work the lower arm free from the frame brackets and remove it. For installation, inspect the lower arm bushings for any damage; if replacement is needed, take the lower arm to an automotive machine shop for the old bushings to be pressed out and new ones pressed in. Position the lower arm and install the pivot bolts, washers, and nuts without tightening them yet. Attach the steering knuckle to the lower balljoint, tighten the nut to the specified torque, and install a new cotter pin, ensuring the nut is tightened enough to align the slots with the hole in the balljoint stud. Tighten the pivot bolt nuts to the specified torque, support the lower control arm with a floor jack, and install the torsion bar. Reattach the shock absorber and stabilizer bar to the lower arm, then install the wheel and lug nuts. Lower the vehicle and tighten the lug nuts to the specified torque, and finally, drive the vehicle to an alignment shop for a front end alignment check and adjustment if necessary.