These 1/2" Taller Upper Ball Joints fit 1967-1969 GM "F" Body (Camaro/Firebird), 1964-1972 GM "A" Body (Chevelle, Cutlass, Skylark etc) & 1968-1974 Nova. They are compatible with StrongArms, stock arms, stock spindle (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 (loaded tire leans away from the turn). This is a huge compromise in cornering performance and feel. By installing a taller set of balljoints, we reposition the control arms to correct this condition and create a much more stable and enjoyable driving and cornering experience.