Rear Pro Coil shock for 73-77 GM A-bodies. Single adjustable and includes all mounting hardware, brackets, two shocks and springs with a spring rate of 200. QA1 offers bolt-in Rear Coil-Over Conversion Kits for 1973-1977 GM A-Bodies. These kits include specially designed USA made mounting brackets and single or double adjustable aluminum shocks, springs and all necessary hardware.