Will swapping them fix the lean or make it go the other way?
I just did so with my front springs and it helped mine.
Is your motor offset to one side or the other? Stock, the fj60 engine is way over to the driver side. This, plus you in the driver seat is why OME makes different, or sided springs for these big wagons.
Its free to try... I would have to try if mine leaned like yours does, just sayin'. ;p