My recommendation is to take it to an alignment shop which has experience with trucks, and not a "schooled by computer" kid--
You need a guy who can figure it out for himself and not rely on computer prompts.
A good alignment tech should be able to adjust the angles to achieve good handling and tire wear. First the wheel should be centered-toe should be aligned, and centered to a centered wheel. Then the ride height is adjusted to level the frame. Try , if possible to have this accomplished before you arrive
Now, what is needed is an acceptable caster on the driver side. Be careful here-as the camber adjusters will move the "triangulation" point and throw the caster off. About 2-3 degrees of caster will help hold the vehicle in a straight line real good.
-adjust the caster on the passenger side to match-via the 2 piece upper control arm.
then adjust the camber to achieve a 0 degree negative or positive camber on both sides, or as close to this as possible. A bit of positive camber is a good thing-
since it is lifted-you'll probably be letting the shims"in" a bit to lessen the camber angle-(I would imagine it is about 8-10 degrees positive now-this is what they are referring to. Lowering the front puts the angles to the other, or negative extreme making the front tires do this / \ when viewed from the front. Lifting makes the front tires do this \ / , or too far positive.
A recheck of caster after that, which will require a recheck of the camber if it is adjusted-
keep in mind-if the rear of the driver side upper control arm is moved in using the camber adjuster, while leaving the front adjuster in place,-you have INCREASED the caster angle by pulling the upper ball joint REARWARD.
Understand?
It will take more wrenching, and he should ignore EVERY suggestion and prompt the computer is telling him, going purely on values displayed.
A good alignment tech knows good angles--