FWIW, there are instructions in one of the factory manual DL's that outline the torsion bar leveling procedure in detail...we're talkin string lines & the whole deal...
A bit complicated, but if you REALLY want it to be by the book...
OTOH, I would trust a measurement from flat level concrete to the top of the wheel arch more than I would the gap meas.
Also, I usually give the drivers side about 1/2-3/4 turn extra tweak, to compensate a little for the usual 230 lb load on that side...![]()