Alignment Gurus (Yes another)

Okay so i got my truck lifted, with Maxtrac spindles and fox shocks/coil-overs. the issue i'm having is the truck is attentive, and drifts to the left and i'm not really happy with the way it drives on the freeway.

Side note: the coil-overs were only adjusted 3/8 of an inch out of the box to level the truck out.

Please see see image, Thanks in advance.

Edit: wheels are 20x9 0mm offset with 275/60/20 AT tires.
Edit #2: Stock Upper Control Arms.

 

Drifting left is because cross caster is too great.
The side with more caster will toe-in more when driven.
I suggest +2.2

You need more positive toe(toe-in) with that offset; it adds positive scrub.
I suggest +.07.

Is "attentive" good or bad?
What exactly don't you like about the highway feel?

 

Attentive as i have to do more corrective steering on my part. this may be do to the drift. but maybe that wont be an issue when i take it back to them to resolve the drifting to the left. Guy said they set it the caster that way s for road crown, my truck has never been aligned before (factory stock Drove perfect) and i'm guessing they don't compensate for "road crown" off the assembly line.

 

Is it made worse when the suspension articulates, goes over bumps or the weight shifts side-to-side?
That's tramilining or bumpsteer...both are made worse by adding positive scrub and/or high caster.

Most prefer cross caster to compensate for road crown.
I prefer cross camber if compensating for road crown.
Cross caster uses dynamic toe...
Cross camber 'balances' the scrub force side-to-side...

 

None to little bump steer. the truck feels fairly solid with minimal body roll so far. i'm going to take the truck back to the alignment shop soon to have them correct it but i wanted to get an experts Opinion on the matter. just wasnt too sure of the numbers i should expect with me still using the Factory control arms.