Our 1963-72 Chevy truck tubular lower control armshelpto correct the camber and ball joint angle problems often found when using a drop spindle or lowered coil spring. We then designed an extra 2.0 degrees of caster into the arm to make the vehicle drive straight and true. These arms come with factory cross shafts making replacements a snap. Advanced design corrects geometry for lowered vehicles. Requires use of aftermarket sway bar. Works with stock height or 2.5″ drop spindles.