The procedure works, but there are limits to how much slack can be recovered with this. I have tightened my balls (heh-heh-heh) as much as the adjustment screw will go, but there is still a little slop in the steering. Two guys who have worked on my VX (including an alignment shop) insist that there is no loosey-goosey play in the suspension and steering rack, so I assume I'm at a point where I can't get it any tighter without replacing the steering box & Pitman arm, and probably all of the bushings.

Anyway, IIRC, the steering box with the adjustment screw is either right behind or right in front of the radiator on the right side as you look at the engine bay in the VX. Not too hard to spot - it looks just like the one in the picture in the planetisuzoo link.