Use clamps to fine tune the rear suspension. I've found the best way to do this is to have somebody video the car from the side. Make sure you have front end rise, fine tune the degree and rate of rear rise by adding/subtracting front segment clamps and removing rear clamps. I always left at least one rear segment clamp on, the one closest to the axle tube, to prevent the rear spring leaves from splaying laterally. There is no set formula to this, every car will be different.