Look inside the rear spring pockets before laying out this earlier B-body conversion. Solid pockets need drilled holes; pockets with a center opening need clearance notches. The lower StrongArms also provide the parking-brake cable attachment, so keep the cable routing in the plan.
 
Fitment
Verified applications here cover the manufacturer-listed 1959-1964 B-body models below, with the matching Ridetech upper-arm and adjustable panhard arrangement.
Ridetech catalogs the package as 1958-1964, but the combined coil-over instructions begin at 1959. Confirm a 1958 combination with Ridetech before ordering; 1958 fitment remains unconfirmed.
Manufacturer-listed models: 1959-1964 Chevrolet Bel Air; 1959-1964 Chevrolet Biscayne; 1959-1961 Chevrolet Brookwood; 1959-1960 Chevrolet El Camino; 1959-1964 Chevrolet Impala; 1959-1961 Chevrolet Kingswood; 1959-1961 Chevrolet Nomad; 1959-1961 Chevrolet Parkwood.
 
Specifications
Part 11056210; HQ single-adjustable rebound shocks and tubular lower StrongArms with self-lubricating R-Joints.
Coil-over lower mounts and parking-brake cable provisions are built into the lower arms.
 
Included
Lower StrongArm pair, two HQ coil-overs and springs, upper mounting/clamp plates, brackets, spacers, special rear D-bolts and installation hardware.
 
Before ordering and installation
Matching Ridetech upper-arm/panhard components and a compatible MuscleBar are separate. Factory shocks/springs and a sway bar attached to the lower arms are incompatible.
Use the rear mounting bolts with the machined flats in the correct lower-arm axle mounts, and attach the parking-brake cable using the supplied provision.
Check loaded shock travel before final spring preload. Do not back the retainer below zero preload to lower the car; follow the manual on spring-rate changes. R-Joints need no added lubrication.
Manufacturer product information and fitment
Manufacturer instructions