As a starting point I will always use 22.5 oil in the front, 25 in the rear and for 2WD, about -2 or -3 degrees camber in the front (doesn't hurt for 2WD), 0 degrees camber in the back, or close to it, 1-2 degrees toe-in on the front and 0 degrees toe in the rear, 2 degrees anti-squat, sometimes I make the front shocks a little more horizontal if I am still not getting enough steering, as for tightness maybe 2 steps above stock in the front and 1 step above stock on the rear, etc.

http://users.pandora.be/elvo/15/1.html
You can't really think of just one setup alone, you need to think of the truck as a whole. You drive it a bit, try to find faults with how it handles, and then try to correct those faults, its an iterative process.