clubwagon steering

i have a 86 clubwagon 460c.i. auto/power windows /locks/tilt wheel 3/4 ton runs drives looks great but the steering seems to wonder all over the road when driving and gets worse when i go faster,
and it has good tires on it all around.
looks like the ajusting screw is turned down even with the nut on the steering box.
everthing seems tight under neath
i have been pushing and pulling on everything in the front end seems ok.
just the play in the steering
and on the tilt wheel it will not lock in the first 2 positions all the way forward almost like some one pulled hard on it and stripped it it will lock in the straight position or if you have it down it will lock but not up in the 2 top positions
thanks for any and all help
jenn