Monotube racing shock technology in a stock mount application. This new stock mount shock offers great consistency and tunability. The 70-4 Ford Rear Shock for 1979-1983 Mustang has a 2.00 body diameter with a compressed length of 13.21 and an extended length of 21.09. Custom tuned shock packages available for rules requiring the stock mounting points. Features stock mount legal tie-bars and bushings, OE compatible hardware, and a .5 hard chrome piston rod. All AFCO Racing Shocks are 100% Dyno tested. Also check out the AFCO Non-Adjustable Strut for the 1979-1993 Mustang, part #30029SP.