Camber kit

[Underdog66]

On my 2005 4wd Expy the alignment shop told me I needed a camber kit in order to align one side of the truck.
Can someone explain what the purpose is, other than the obvious, and why the truck cannot be aligned without it?
This is the alignment report.


Thanks

 

[SafariGoneWrong]

Did they check ride height or at least mention it? I’m showing the parts needed are 2L1Z-3B236-AD for the lower arm rear bushing and 2L1Z-3B236-AC for the lower arm front bushing from the shop manual but it seems they’ve been discontinued. So over to Rock Auto and your preferred brand. Since your camber is negative I’d see if it’s riding a bit low on that side first; 2 degrees is fairly healthy so I think it would be noticeable.