[THEFERMANATOR]

Steering dampers are not really all that neccesary on the XJ's at stock height, I've run many of em without em without issue. If you were having issues with the wheel vibrating under braking, or jerking over bumps I would say damper. With 140K on the clock, I'm betting steering box or track bar. The wonderful GM SAGINAW box is infamous at 125K+ miles to get loose and sloppy. You can adjust them slightly, but most of the time not enough. Also check your intermediate shaft for slop(the one that connects the box and column). The XJ's normally didn't give issue here, but the YJ's did.

Here's a few pics of the caster adjustments. You use these to get the caster close, but cross-caster can only be set with ball-joints. Pardon the grease and dirt, I run the SH!T out of my JEEP ;D.
Here's the lower control arm attatching point vehicle side.

Backside where the 2 bolts that hold the shims in place.

And an underside shot of the shims.


And to satisfy RB, here's PINKY.