Everything points to someone not knowing what they were doing and trying to add camber with physical force. Either that or it was never cambered intentionally but was rather in a wreck that broke the tube to housing attachment. The latter seems the most likely.
You aren't likely to see (or feel) any real performance difference for cambering a rear end within the CMC limits. But, lots of little things do add up to a performance benefit. Rear camber would be just one of those little things. For perspective, it's a lot less work than moving the rear axle 1" forward on an AI car.
Richard P.
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