Hotchkis 63-66 GM/Chevy C-10 2WD / 67-72 GMC/Chevy C-10 Pickup Tubular Lower Control ArmsHotchkis Sport Suspension 11390L 1963 1972 C 10 Tubular Lower Control Arms. Install the Hotchkis Sport Suspension Tubular Lower A Arms on your 63 72 C 10 Pickup and gain vastly increased handling and control. These 100% TIG welded control arms are packed with features to make your truck handle like a G machine. Completely re engineered these arms extend the wheelbase 1. 8 in. and add up to +9 deg Caster for precise handling and maximum front end grip.