This page contains a list of rear coilover kits that mount behind the differential for 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972 A-Body cars (such as Chevelle, El Camino, Monte Carlo, Gto, Lemans, Cutlass, 442, Skylark)--these kits include Viking shocks, Eibach springs, rear cross-member (upper and lower) shock mounts, brackets, and hardware.
Global West Suspension has developed an easy to install rear coilover suspension kit that provides adjustable ride height, adjustable shock dampening, and installs simply by drilling a few holes. No welding is required. The kit is supplied with Viking double adjustable, QA-1 single or double adjustable shocks. Afco, Penske and other shocks are compatible with this system and are available from Global West.
Note: These kits are supplied with an upper cross member. Here is why. Years ago, when air shocks were popular, people would use the air shock to raise the rear end and support the load through the air shock. The following photos show what can happen over time. This happens to be a Chevelle that Global West had to repair before installing a suspension kit. So as you can see, you need a cross member to support the new load for a coilover. The shock mount was not designed to support the vehicle's weight. (See the photos below.)
This photo shows the damage to a 70 Chevelle that had air shocks holding up the rear. The load pounded out the upper mounts.
Global West builds a cross member to take the load of the spring and shock combination passing it through the new cross member and the original frame mount.