Control arm INSERTS: Rear lower 64-72 A body GTO Chevelle + (Pr)Weld in lower control arm inserts designed for 1964 72 GM A Body cars with coil rear springs, including GTO and Chevelle models. These inserts serve as both a reinforcement close in and an internal brace, enhancing the strength of the lower control arms. Supplied in pairs for each vehicle, they are especially effective when installing a rear sway bar, providing gusset support for the bolts passing through the lower control arm. Suits 64 72: GTO LeMans