For a general suggestion, I like more than 2 degrees of caster and between 1/2 and 3/4 degree of NEGative camber.
My baseline setting is always to adjust the front cams all the way out toward the fender and the rear cams in toward the engine.
Caster and camber are directly related in these systems. Often, due to the design, it can be hard to get enough caster without the camber going positive. 2 degrees is okay but more is better. I would NOT want any positive camber though, not if you intend to turn corners with any decent speed. Cars with positive camber and soft stock suspension often tend to scrub tread off of the outside edges of the tires when cornering. A little negative camber hurts nothing yet improves cornering power because when the body leans during turns, that negative camber tilts outward to positive.
I don't know how it happened but my 70 Charger was able to align to 4.5 degrees of POSitive caster, .75 degree of NEGative camber and 1/8" toe IN.....all with stock replacement parts. It steers great and the front tires do not wear unevenly despite some real spirited driving!
