[problazer]

Did it sag to one side before you installed the drop kit?? If it did not sag, I don't think swapping your rear springs would affect the lean now if all you did in the back was to install a flip kit. The parts that you replaced are a more likely culprit if the lean came after you installed everything. The front has changed parts, not the back. The back was relocated.

If it did lean prior to the drop kit, then swap the rears.... good luck