you had a pst kit installed right? if so then it came with a new idler arm.
i looked at your alignment specs with a buddy at work. look at your left and right caster. your left caster is .1 your right is .3. on a perfectly flat surface you would want your caster to be exactly the same on both side for the vehicle to track in a straight line. however, roads aren't perfectly flat, they are crowned in the center and slope down on the sides. its not a huge slope but enough. i'm guessing this is done for drainage reasons. anywho, since roads arent perfectly level you want your caster on the right side set higher than on the left side to compansate for the angle of the road. alot of shops (including us) set the caster on the right side of the vehicle .5 higher than on the left. if you look at your specs your caster is set at only .2 higher on the right. we would have set the right side caster a .6 (or as close to it as possible). so this is enough to make it pull right. it shouldn't jerk hard right when you let go of the wheel but its enough to make it glide right.
this said you could have other problems that are adding to the right pull, like a dragging caliper or something
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'51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works
'05 1500 Crew Cab
RIP
'84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker
'80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's
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