The adjustable rear upper control arm for 1969-70 models is shorter then the 1965-68. The upper arm adjusts while on the vehicle. No need to disassemble for resetting the pinion angle. This control arm is a must if a 9-inch Ford rear end is installed. The arm has a rod end on the frame side and a rubber bushing on the rear end side for noise cancellation. The arm has a Hex adjuster that is used to adjust the pinion angle. After the angle is adjusted, jam nuts are used to lock the arm length in place. The upper arm is sold individually because some cars only had one upper arm from the factory. New hardware is included.