pickup is within a half inch front to rear as when unloaded
I *think* you mean that the heights are within 1/2" of UNLOADED height, not within 1/2" of each other, but just in case you meant 1/2" of each other, you need to know that that is no longer the way to adjust a WD hitch.
Modern WD hitch adjustment deals exclusively with the front ride height only. Depending on the age of your truck you would bring the front end back down to unloaded ride height by adjusting the WD hitch (older) or between halfway and all the way back down (within the last 5 years). Rear ride height is irrelevant.
