We were dragging so bad that we ended up breaking one of the gear pack assembly gears due to racking the rig getting into the FIL's property last year. After replacing the gear pack, I found trailerblocks.com. I ordered the 2" lift kits with new 9/16" u-bolts and tie plates. The rig now rides level, and surprisingly, much more stable as the loads on the axles are now balanced. Don't let the prices scare you, as this is a Canadian machine shop and those prices are Canadian dollars.
https://www.trailerblocks.com/collec...ing-tie-plates