1958-1964 GM Impala Biscayne Front Springs (Big Block) Part Number: S-84

Description

The S-84 spring has a mild increased spring rate over the standard 409 spring. It is designed to lower the car  approximately 1 to1-1/4 inches below stock.

Lowering the front end  has a couple of benefits, the suspension is setting more on the null of the arc for a less camber change over minor oscillations therefore reducing some tire wear and the other  for some a more pleasing appearance of a nose down attitude.

Other components that improve the handling dramatically is the ST-5864 dumpster kits, These kits fix the wonder associated with 58-64 Impalas. Add the Global West tubular arms and your front end will preform similar to a new car. The part numbers you might be interested in would be CTA-84A for the upper arms and CTA-84L for the lowers.

Additional Information:

Heavier rate springs (normally called “big block” springs) for Impala, El Camino, and Biscayne for 1958, 1959, 1960, 1961, 1962, 1963, and 1964 models had a rate for 400 pounds per inch. The heavier rate really was not about the engine size but more the type of body. The 400 pounds springs were standard on all 1958 models and then changed to just being available on station wagons from 1959-64.

The four different rates most used are 300, 325, 375, and 400 pounds. All station wagon springs were rated at 400 pounds per inch and surprisingly all 58 models had 400 pound springs. The 1959 Impala and newer generally had 300 pound springs while Biscayne and Belair came in with 325 and 375. These rates were used for 6 cylinder, 283, and 327 applications. The 409 cars actually had 300 pound springs unless it was in a station wagon and then a 400 pound spring was used. Ride heights also varied. Front end weights all hovered around 2000 with a variance of 150 pounds up or down.

The s-84 spring from Global West Suspension is a mild increase over the station wagon springs. It is designed to lower the car one on the lighter front ends and could drop an extra quarter of an inch on heavy front end models. Global West lowered the front end down this distance to get the front suspension sitting at its best geometry. Include the Global West control arm package and the front end starts to work, not to mention the power steering system Global West also came up that repair the factory bump steer problem.