RideTech offers these 1/2" Taller Upper Ball Joints that fit 1967-69 GM F-Body Camaro and Firebird, 64-72 GM A-Body Chevelle, Cutlass, Skylark and more plus 68-1974 GM X-Body Chevy Ii and Nova. They are compatible with StrongArms, stock arms, stock spindle but not for use with Tall Spindles.
Most OEM front suspension geometry, in addition to being designed over 50 years ago, induced positive camber when cornering. This is a huge compromise in cornering performance and feel. By installing a taller set of ball joints, they reposition the control arms to correct this condition and create a much more stable and enjoyable driving and cornering experience.