caged

yes, just think of that shopping cart with the wonky wheel. that is because the caster plate/mount got bent, therefor the caster has changed angle.

if you get adjustable control arms, you can lengthen the lowers and adjust the uppers enough to get your caster back to acceptable angles.

think of how level the axle sits when stock, then lift the body up and the control arms pull the axle pinion upwards. if you were to lengthen the lowers, it would push the bottom of the axle forward while the uppers will keep the top in place, therefor lowering the pinion angle back to where it was before. when you do this, that also affects the caster angle since it's all fixed.

sorry, it's kinda tough to explain, but simple to do.

camber can only be adjusted with either replacing the outer c knuckle, or as mentioned, adjustable ball joints, which i'm not a fan of.

toe in can be checked very easily with two people and a tape measure. just choose a tread block on the front of the wheel and measure using the same tread blocks on the rear of the tire. measuring from the most center of the circumference of the wheel. should be between 0 and 1/8 of an inch greater on the rear measurement.