Modernize your early Ford and Mercury front suspension by installing this pair of adjustable upper control arms from SPC. SPC has built in 3deg of caster to improve return to center with today's radial tiers. The camber curve has been optimized by utilizing 'Shelby Drop' geometry in the billet aluminum cross shaft. The arm pivots are our maintenance-free xAxis Sealed Flex Joints for tight, responsive handling. Camber can be set to -2deg, -1deg, or 0deg for superior cornering. Use these arms with either an OE style spring/shock or an aftermarket coilover kit. SPC's arms come equipped with a stock style ball joint and all of the mounting hardware. California Residents WARNING