No. You measure from the bottom of the rocker to the ground.

Unlike on human females, a sagging rear is good for the car; some people think the rear is sagging, but it's where it should be. The hookup factor will increase the more dragass you have because these cars are rolling defects in chaisis design.

Going on memory recall, not one of my better subjects, the 8.1" seems somewhere in the ballpark of factory specs.