I just got through doing my suspension and steering recently. The result is the truck sits a bit higher, and more level. Last thing I did was the alignment, and I figured I'd be good to go. I also balanced the wheels. But I still don't think it's right. Seems like there's maybe still a bit of wander in there, and a little bit of a shimmy that seems to be worst at around 45 MPH. I have a factory service manual and I noticed there's a caster compensation chart in there which looks like it's to be used to account for differences in height from front to rear. You measure both sides on the front, and do the same for the rear. Then do the same comparison for the tire radius. you take the average difference from both sides, factor in the difference for average tire radii, subtract from 4, and go to the chart where, based on the results of the math, you get the number of degrees of caster to use. That's sort of a readers digest version, but it seems the idea is you need to compensate for the way the truck sits in caster to make it drive properly. Does this make sense? I'm just trying to get some idea of what's going to get this beast to finally drive as I would have expected given I've thrown the kitchen sink at it as far as new parts go. Any help would be terrific. 
