Twin I-Beam Camber Adjustment
 

Maybe I am the last one to figure this out, but an outfit called Specialty Products Co. (www.specprod.com) sells these cool spacers outta aluminum so you can adjust your spring length so you can pull outta the negative camber world. Just thought I would pass it on, ya'll take care!
:-D

The company website lists caster adjustment bushings but no camber adjustment.

I think in the hard copy version of the catalog (saw one at a Car Quest store yesterday) they speak of camber adjust in the spacer section. I have a copy on order and will report back when I see it. I need about a degree and a half of positive camber, and doing some trig (inverse TAN rise over run) I added 1 inch of spacer to a 36" approx. arc and got close enough. The 36" was a wild ass guess measurement from the I beam pivot point to the bottom of the spring center.