front knuckle and control arm

A bodies from 1963-1976 all had the same basic design control arm. The ball joint shaft diameter did change from the 9" to 10" drum/disc set up. 1973 was the change over to 4.5" bolt circle and the single piston floating caliper design. Prior to this, the four piston opposed caliper design and the 4" bolt circle were installed on all A bodies regardless if it is a drum or disc system. There are many control arms still floating around, just post for some and thousands will appear! Including the aftermarket ones!!!