ball joint issues

Sorry, but your ball joints are not going to fall apart. The only difference in lower ball joints revolve around disc or drum brakes. The steering arm on the disc ball joint has a different curve for caliper clearance. I wish this old chestnut would quietly die, since it was started to get people to convert to disc brakes so the car would stop. In 40 some years I have seen one lower ball joint fail and the "driver" hit the curb at the end of a median doing 60 in a 35 zone. Really can't consider that a ball joint failure since the K member was also bent and the control arm was ripped loose. The 73 up A bodies used a different upper ball joint and control arm so it would be easier for Ma Mopar to use one brake/spindle set up for A and B bodies.