Hotchkis 58-64 GM B-Body Adjustable Upper Trailing ArmsHotchkis Sport Suspension 1213 1958 1964 Chevrolet B Body Adjustable Upper Trailing Arm. Improve handling and traction on your 58 64 Chevrolet B Body by upgrading your flimsy stock trailing arms with our Adjustable upper trailing arms. Fabricated and TIG welded from . 120 wall rectangular tubing these adjustable arms feature greasable bushings grade 8 hardware and a durable powder coated finish. Note: These arms are sold each. Please verify if your