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UMI bolt‑in rear coilover conversion brackets for 1964–1972 GM A‑Body vehicles accept 2½" racing coilovers and offer adjustable ride height with a 225 lb spring rate and damping control. The kit features an FEA‑designed reinforced lower bracket that bolts to Quick Performance rear mounts and a reinforced upper mount, plus trailing arm height adjustment to tune the instant center. Made and tested in Philipsburg, PA from US materials.
UMI 64-72 GM A-Body Coil Over Conversion Brackets Kit -1in to +1in Ride Height - 225lb Spring Rate
