Truck is at the shop for alignment today. I asked them for a before/after printout, and to set the caster on the high side. We will see how it pans out. I'll drive it, see how it has improved then look at my steering shaft and steering box for play.
I think I will install my sway bars to help with some body roll.
Further out, I need to swap in Super Duty rear leafs and air bags. A few friends have complained that the ride in the back seat from a rigid rear suspension creates a harsh ride - makes sense - I have soft Super Duty leafs up front, but the rear springs are factory OBS with at least 1 add-a-leaf per side that the previous owner had installed. Just turning into incline/decline driveways from the road, you can tell that 90% of my suspension articulation is in the front.
Also, I may swap to U codes up front. The ride is good, but I wouldn't mind a slight decrease in height, not to mention an even softer ride, as I barely fit into my garage right now by maybe 3/8". Once I get new tires, or there is snow on the ground, I will hit.
Correct me if I'm wrong, but an RSK should increase positive caster, not decrease it? Here's to hoping the alignment solves the death wobble and some of the wondering and funny steering that the truck was doing.