[updated:LAST EDITED ON Feb-21-02 AT 03:38 PM (CST)]Hey Arizona...
There are typically two adjustments on the box, "worm bearing adjustment" and the "pitman shaft". Most of the boxes I've seen are the Saginaw type (a raised "S" cast into the side of the box), so the info below should help. I don't find the '63 factory service manual or the '64 supplement much help when it comes to the 4x4 trucks though!
Like Dave and others have stated... looks like you may have some worn parts that need to be replaced. Some adjustments may help but it won't fix it.
I would recommend that before you make any adjustments that you mark (scribe) the current position of your pitman arm and pitman shaft so you have a reference. Also have your front wheels straight, jack up the front and put jack stands under the alxe. Remove the left tire for easier access.
1)Remove the pitman arm from the steering box. Make sure the steering box bolts are tight.
2)Turn the steering wheel slowly from one side to the other. DON'T BANG IT OR FORCE IT, CAUSE YOU CAN DAMAGE THE BOX!!!
3)If it feels rough when turning the steering wheel, that usually means the parts in the box are worn or faulty. If it's hard to turn or binding it's probably excessive worm bearing adjustment or the steering shaft (column) is mis-aligned.
4)Turn the wheel gently all the way to the left (or right). This takes the box off the "high point load".
5)With a spring scale (I've used a light, 0-25Lbs, fishing spring scale, also useful when setting up the pre-load on the steering knuckles)measure the pull required to keep the wheel in motion. Light duty boxes should be in a range of about 1/2 to 3/4 lbs. Heavy duty boxes about 1-1/2 to 2 lbs. Note: adjustments made with the correct lube installed.
6)Loosen the worn bearing adjuster lock nut and turn the adjuster until you get within the limits.
7)Tighten lock nut and recheck pre-load.
Adjust the pitman shaft pre-load next.
1)Loosen the lock nut and turn the lash adjuster screw in. Go in small steps here, like a 1/4 to 1/2 turn. Tighten the lock nut and rotate the steering wheel back and forth through the entire range. Go easy and don't "Bang" it from side to side! If the lash can't be reduced (or eliminated) or if the gear load feels rough it's probably time to replace some internal parts.
2)Center the steering wheel, equal number of turns left to right.
3)Attach the pitman arm back up to the box and tighten the lock nut.
Hope this helps,
