[68LSS1]

Yes, it's because your pinion angle is now off. Imagine holding a plate out in front of you. Turn it and imagine that it is the rear u joint. Tow tilt the top of the plate away from you and turn it. Now your plate (or u joint) is traveling in a oval instead of a circle. At the top and bottom of the oval is where the "wheel hop" is coming from. You can get tapered shims to install between the leaf springs to correct this. Or custom make the carrier bearing mount (lower it).