Burch - I think you've misunderstood the instructions. You only measure the distance for the front wheel to the ground. The objective is to get the distance unloaded and loaded and then adjust the spring bars until the front fender is at least half way back to the unloaded measurement. For sake of argument, if the difference between loaded and unloaded was 4 inches, you'd want to get back to within 2 inches of the unloaded measurement. You should also know that this measurement method only gets you close, the real criteria is how much weight did you transfer back to the front axle - which can only be determined on a CAT scale. I have the same hitch and my measurement was almost exactly back to the unloaded number, but the truck and trailer did not feel stable. On the scales I found that the front axle had 220 pounds less than unloaded. By moving the trailer brackets up one hole the front axle was only 75 pounds less than unloaded and the truck/trailer felt much more stable - especially in windy conditions.
2015 Rockwood Ultra Lite 2604 WS. Rear LR, large street side slide with small wardrobe slide in BR.
2014 Ram 1500 Eco Diesel Laramie Quad Cab.