Suspension Control Arm Kit. Control Arm Kit, Upper, Street 70-81 Camaro. Upper street control arm kit for 70-81 Camaro. Includes ball joints and bushings. Bolt-in spring adapter needed for use with stock springs.. QA1’s GM A, B, G and F-Body and S Series Truck Street Control Arms use a factory replacement ball joint and polyurethane pivot bushings. These work great on vehicles used primarily for cruising and long distance events. Configured for QA1 Pro Coil Systems, these street control arms feature powder coated tubular construction for increased strength and great looks. A bolt-in spring adapter is available separately to allow the control arms to be used with stock springs. All of the upper arms feature an offset cross shaft letting you quickly and easily adjust camber. All of these arms are designed to add 3-4 degrees of caster and 0.5 to 1 degree of negative camber when used together. When used independently they will add approximately half of the preceding numbers.