Look at the angle of the shackles in relation to the frame.If the arc of the spring is differant from DR side to PAS side it might show in that way.I took four sets of front and rear springs off at one time years ago.It was surprising how differant they all were when side by side.I mix matched them to all have the same arc.Just a thought that might help.Let me know if that turns out to be anything.Good Luck
