^Glad that fixed it, but shimmed the axle meaning wedge shaped shims between the springs and spring perches are typically used to change the faster in the front axle. And generally more caster = tracks straighter, less “floating” and a bit more steering effort.
Seems strange that a vehicle after about 30 years suddenly had a caster issue without something else changing.
Not being critical, I just generally try to understand the root cause of issues. And you don’t generally see axles needing to be shimmed or rotated except to correct caster and/or pinion angles on lifted trucks.
So did they presumably add caster to the axle and nothing else was amiss? Did you get a before and after print out of the alignment?