i know this is a late post but i wanted to add something for those doing a search for this topic.
my truck is perfectly aligned (by me) and double checked on a machine (no adjustments needed). i took it right to the recommended specs (lots of caster) and i have tried the factory specs too. i have universals in the steering shaft ONLY because i had them on my chevelle and i didn't think i would get anything for them on ebay. i have the polygraphite bushings everywhere, new moog everything, zq8 steering box, and stock wheels. i must admit i don't have a stabilizer and probably never will. when you turn my steering wheel there is ZERO play; when you turn the wheel 1/2", the front wheels move.
my truck still wanders slightly. i think they all just do that because of the AWD and big tires. i barely even notoce it but my girlfriend bitches about it constantly and drives slower which makes it worse.
anyway thats just my take on the whole steering wander thing. if you don't like it go buy a WRX or AWD eclipse and bolt on 100 HP.