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The P/N 403233‑1 a‑arm kit from UMI for 1964–1972 GM A‑Body swaps stamped arms for tubular uppers and lowers and includes premium 1/2" taller upper ball joints to enhance camber performance. Built with TIG‑welded DOM tubing, CNC machined ball joint holders and CrMo cross shafts, the kit works with factory spindles, lowering springs and coilovers. It ships preassembled with recommended alignment specs and installation instructions.
UMI Performance 64-72 GM A-Body Front A-arm Kit Delrin Bushings
