You dont need a pickle fork to do ball joints. To remove the TRE, just remove the cotter pin and loosen the nut, give the TRE a few good whacks on the side ant it will pop out.
To remove the steering knuckle, remove both cotter pins and nuts then using one ball pen hammer with the ball on the small flat on the knuckle near the upper ball joint and the flat of the hammer sticking up, give the stationary hammer a good whack with a mini-sledge. 3 whacks and it usually falls right off.
I would replace uppers and lowers at the same time and rent a ball joint press from Advance Auto or Autozone.