Have you checked the swivel preload? Wandering is either excessive play somewhere or not enough damping. The swivel bearings are responsible for most of the steering damping not the damper itself - you could drive with no damper and properly set swivels and not miss it.
Suspension bush condition? Rear A frame ball joint?
The wandering was there before so its not caused by the lift, its just been highlighted by it.
Be very careful adjusting steering boxes, too much and you will cause premature failure. Its not just a "do up til its alright" job.
Track rod ends?
Get all the above checked out first, cranked arms are not a solution to vague steering, as Stage Recovery says it is for the self centering