Reply to "2000-series steering rack adjustment"

The worm or pinion gear in a rack-and-pinion is 'adjusted' solely by the shims above and below the worm itself. I've rebuilt quite a few beaten-up Pantera racks which may be similar, and have never needed to reshim a worm gear.
Best guesses: either the stock shims were incorrectly put back on the worm during the rebuild, a tooth is missing off the rack, the pressure-foot on the left-hand side of the rack is missing, or the bushing on the right side was not pinned in place by a setscrew and has come adrift. Guesses #5 & 6 might be a badly worn tie-rod end or ball joint, or the whole rack being incorectly mounted to the frame.
In possibilities #2 and 3 above, a complete disassembly will be needed to repair. In any case, the car sounds undriveable with any degree of safety at this time. Go slow!