You need to get to the top of the steering box. I think I had to pull the aux radiator fan. You loosen up the 5/8 nut and turn the allen head screw in a very little at a time untill you get one inch play in the steering wheel, then tighten the lock nut. DO NOT move the screw in too far or you will damage the gears. I found a write-up on the net somewhere, but can't find the link now. I only moved mine in 1/6 of a turn at a time until the play got close. I had about 4" of play to start and only had to move it about 1/4 turn in to get to 1" so be careful and go slow.
MoFo