QA1 Pro-Coil Twintube Single Adjustable Coil-Over Shock Kit - Rear - GM A-Body/G-Body 1964-72 (Pair) 89406A All race driver pants are

All race driver pants are assembled with heavy-duty

460 lb/in rear spring rate

330 lb/in Spring Rate

GPS Module

QA1 Pro-Coil Twintube Single Adjustable Coil-Over Shock Kit - Rear - GM A-Body/G-Body 1964-72 (Pair) 89406A All race driver pants areQA1 offers bolt in Rear Coil Over Conversion Kits for 1964 1972 GM A body vehicles. These kits include specially designed USA made mounting brackets and single or double adjustable aluminum shocks, high travel springs and all necessary hardware. Single adjustable shocks provide 18 positions of simultaneous rebound and compression adjustment while QA1's double adjustable shocks provide 18 positions of compression adjustment and 18 positions of rebound