Raising the front end

Be careful, the torsion bar adjustments also control (to some extent) the front end alignment. If you raise or lower the front end it changes the amount of weight on the front end affecting your caster/camber/toe. After I installed the larger torsion bars in my '69 Barracuda and set the rear body height (new leaf springs) I took it to the alignment shop. I asked the alignment guy to set the front as high as possible and he said he could only go as high as he could and still keep the alignment properly set. So there is a direct relationship.
Same thing happens when you raise or lower the rear body. Raising the rear shifts more weight to the front forcing the front end down (changing wheel alignment). Lowering the rear does the opposite but also changes the wheel alignment (less weight on front end).

Treblig