Stock on th rears is 1 degree of negative camber. I wish that was the case with mine. The outside edge of my tires wore out much faster than the inside. Keep in mind i am not lowered and am running stock wheels/tires.

 

I guess I have an excuse to drop it

 

Exactly explain what you mean.
Dropping it won't change the rear camber.

 

You're rear axle may be bent. I'd have an alignment shop check it out and see just what the rear camber is.

 

I noticed the stock camber in the back when I first installed my wheels. lowering the car will make no difference.

 

Lowering the xB can reduce the camber by a tiny amount based on the new angle of the axle "at rest."

What happens is a tiny fraction of the toe-in angle subtracts from the camber because of the tipping of the axle, but the amount is so tiny with this suspension design (couple hundredths of a degree at most, -0.02 degree) that it is almost unmeasurable with the usual tools - it's within their margin of error.

If you see (or measure) bad camber angles in the rear after lowering an xB, that is because it was bad before you lowered it, and something is likely bent... that's parts replacement time.

Tomas