Yup, that rear suspension looks pretty screwed up, look at the front pivot points of that ladder bar assy, and then notice your leaf spring attatchment points, as a leaf spring compresses, it will want to slightly move rearward, but it cant, cause of the ladder bar. Bind up city!! you could ditch the ladder bars, be the simplist solution, or let the rear stay ladder bar, and convert to coil over shocks. Who ever built that must work on mostly chevys, good luck the car, it looks good otherwise..