replacing upper/lower ball joints does the caliper and rotor need removed? on 1991 Chevrolet S10

2 wheel drive, I have rivets on left side cut off with floor jack under control arm. nut on upper ball joint is loose, need to make sure if brake caliper and rotor need to be removed.

Asked by for the 1991 Chevrolet S10
1 answer
try for info. not a job for a novice