Correct me if I'm wrong, but, with a lift, the more caster correction one does, the bigger the front diff pinion angle. Stock driveshaft won't work anymore, transfer case and front diff exits being parallel. Christo Slee told me that his caster plates alone on J springs will cure caster problems, but create front driveshaft ones. All right, my explanation esuckes, but you get the idea. Is a front (and rear) double CV a must for Jsprings lift? Looks so to me.