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UMI's adjustable upper control arms for 12-bolt swaps allow installation of 1964–1972 A-Body 10- or 12-bolt rear ends into 1978–1988 G-Body cars without driveline bind. Adjustable on-car with a 4140 chromoly heat-treated adjuster and equipped with spherical Roto-Joints, these arms use TIG-welded construction, chromoly tube adaptors and CNC-machined mounting plates to provide strong, correct-angle attachment for safe, reliable operation.
UMI Performance 78-88 GM G-Body 12-Bolt Swap Adjustable Upper Control Arms- Roto-Joints
