Hmmmmmm.....I have leveled the rear on more than one Mopar with the helpers. And if the weight balance on the rear tires matters, then leveling the rear with the torsion bars would probably cause a conflict.

Then there's the issue of keeping the front level and keeping the alignment correct when the torsion bars are used to level the rear. It will certainly work in some situations. It's just that it may not always be the best solution.