Lowering the front on my A body?!

wonder if your torsion bars are going bad on one side, or also your leaf springs maybe shot, my dart is the same way except i have no problem on the front, my leaf springs though are weak as hell (original ones) and i have to air up the air shocks up just to lift the back end up, and without it the front sits way higher than the back. it can be that or possibly something else