Somewhere over the years, I have been told, that leaf spring vehicles don't get a great benefit of rear sway bars, & to only use a small rear bar to just tighten things up. Not sure if this is still the preferred advice, just a comment.
My own opinion is a ton & half of steel box with high centre of gravity, is never going to handle great, & my own belief is to get the arse down as low as you can..

Cheers
Max