My opinion is that the spherical rod end strut rods are one of the best upgrades you can do to one of these cars. Doesn't matter which set to me. That helps a lot with the wandering feeling.

My experience is hotchkis sends tabs in the sway bar kit, at least they did for the 67-72 A-body kit. You might want to call.

The LCA thing, its more important that they are tight at the back where the torsion bar pivot is. If they are loose you need to pinch them together and you may as well put a piece of bar across and/or the stiffening plates while you're at it. The photos show what I did, the front end is very precise.

I went pretty big on caster on my Duster and like it a lot. +7 caster, 3/4 degree camber and 1/16" toe, drives great, even with 275 width front tires.