once set you may find that your stock springs have sagged rear can be measured as
E-S= H
E = measure ground to the center of the bolt on the stock sway-bar end
S = measure ground to the center of the sway-bar anchor on the axle
H = Your "ride height" +/- 0.375" of zero means you sitting stock. Negitve numbers beyond that Indicate ammount of coil sag. And yes in this case Positive numbers are a close indicator of total lift in the rear