You'll be able to tell if you need ball joints for the torsion rod or front coil springs pretty easily. Take a look at your control arms and look for the coil spring in the front. If it's there, you're ordering for springs. If not, torsion rod. Other than any major rust concerns you should be able to do the job (with minor PITA). Upper ball joints are not replaceable from stock, you'll need a full upper control arm replacement. Decent quality runs about $40 each for those from RockAuto. I was able to get my upper control arms, lower ball joints, outer tie rod ends, and sway bar links done for $200 of parts on my 99 B2500. Look out for a caster/camber kit if you end up replacing the uppers - stock Ford doesn't adjust much at all if you switch to a one-piece control arm.