Well, even the stock geometry has a camber curve, but the gain is not nearly enough to compensate for the body roll. Only ~0,3 deg per degree of body roll, IIRC. That means that if the body rolls 4 degrees, the tires will be tilted ~3 degrees. With the Shelby drop, the ratio is about 0,7 deg of camber change per degree of body roll, so the wheel camber would only be +1 deg for the same 4 deg of body roll.
You could design a suspension that gives loads of camber gain, but that would result in other negative consequences.