Hy joeflanagan, firstly a small correction, those shims are caster shims not camber shims. Removing two pieces of material of the same thickness, one piece from each side should not have changed the unevenness of the front end. If all of the joints in the steering components are in good condition and everything is tightened to specification the truck should not wander around. I would check out the condition of all components, steering box, kingpins, drag link ends, tie rod ends, leaf spring shackles and spring bushings and replace any worn parts, also check your tire pressures. Once you have everything in good condition, take the truck to an old school alignment shop and have them check the axle specifications and correct if needed and do an alignment. That should correct any problems, hope that helps.
