you'd have to have pretty bad toe in to wear like that. Did you get an alignment after the leveling kit and new tires?
I'd say its EXTREMELY unlikely that your leveling kit threw your camber out that far. It may change with a lift, but probably in hundredths of a degree. You may have a bent inner c or axle tube, but I doubt it.
My money is on your toe, the balljoints or unit hub bearing. tire pressure...maybe. shocks? no.
2002 Arizona Beige F250 Ext Cab Short Bed. 7.3L 6spd 4x4 140k
2" leveling kit, 285/75 Mastercraft AT2's,Napa BFF, DiPricol Pryo/Boost, DP F5 NS/stock/hi/40/80/120/140agg-lope, Toolbox, Audio goodies, IH shiftknob
muffler delete, CCV reroute, AIH/Foil delete,