While the mid-to-late-'70s Ford 4x4 coil suspension was ahead of its time in terms of ride comfort and articulation, it's also now 30 years old. Once one of these well-worn trucks is lifted and shod with bigger tires, sometimes all sorts of scary steering slop becomes noticeable. Although much of the sloppiness can be attributed to worn tie-rod ends, bushings, ball joints, and/or wheel bearings, one of the easiest items to fix is the bolt at the axle end of the track bar.
The repair starts with you ordering two items: a new Ingalls Engineering track-bar bolt (PN 84979, about $81) and a 71/416-1-inch tapered reamer (ours made by KD Tools came from Mytoolstore.com, PN KDT-2044 for $35.90). The cool thing about the new track-bar bolt is that Ingalls machines it with a taper. Unlike the factory bolt, which is a regular bolt, the tapered bolt allows the fit to remain tight as things wear with just a good retorquing.
If you've already replaced other components and your steering still doesn't inspire confidence, follow the easy steps outlined here to rid your Ford of the shimmy-shimmy-shake.