I have an 2010 F-350 6.4L powerstroke. Someone else has replaced most of the suspension in this truck. I did a dry park test, for them that dont know, a dry park test is with the engine running turning the steering wheel right and left enough to turn the wheels to put a loaded stress on the components. There is no play in anything. The steering wheel and the coupler under the dash move together, the coupler connected to the gearbox has no play, the only thing I saw left to change was the steering gear box. I did not use a Red Head gear box, I got a TERREPOWER from IMC. but it does the same thing. And then I checked the input to the steering gear to the pitman and they both move together, So I dont think adjusting the box is going to matter. I know the dampener seems OEM. Also this thing has been lifted. 2 inch puck on top of the springs, with AMP FIT TERRAIN PRO 35x12.5r20LT

 

Wandering issues are almost always (not always , but "almost" always) caused by lack of caster angle. A lift like you described (a puck above the springs) will reduce caster angle.

99.999999% of alignment shops will not do a damn thing to correct this because either because it requires replacing a hard part (the alignment bushing the upper ball joint shaft goes through). This bushing is often a pain in the azz to remove .Think about it, if you charge say a flat $150 for an alignment, but your tech has to spend three hours heating and beating out rusted in alignment bushing , (and BTW, the tool required to remove this cost about $500 too), are you really making money off that alignment?.

Here's a link a Rock Auto link to the various replacement alignment bushings I'm talking about.

https://www.rockauto.com/en/catalog/...+bushing,13508

And here's a Summit Racing link to the special tool needed to remove the alignment bushing if you want to replace it without removing the knuckle from the ball joints.
https://www.summitracing.com/parts/otc-7588a?srsltid=AfmBOooELJT21WmZFjiGaLczt1sUSJEnsZZ1 BXDR1e-O-Unxzj1QNnXj

I've had a lot of relatively experienced gear head type guys tell me the caster angle is not adjustable on solid front axle rigs (and you're likely to see / read that same misinformation on the internet as well). Caster is 100% adjustable , even on stock suspension rigs, it just requires more work than the quickie alignment shop is willing to do (and virtually no alignment shop stocks the replacement bushings either).
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