Thanks Randy.
I don't think the fact that yours are tight with no load is an issue as you need to lift the rear end a bit (with a floor jack, curb, TT's tongue jack, ...) to engage & disengage the StableLoads before & after towing anyway. Though you might find when installing the first StableLoad that just 2 (or 1) wedges is better for your truck.
However, the bracket does seem like an issue - not only because of its location, but also if it is wrapped around all of the springs. I'm sure Torklift will have a solution for that though since they ask so many detailed questions and request pictures of your truck & springs before ordering.