Lyle,
I've got about 1-1/2" clearance from the bottom of the 5er to the top of the bed. I'm looking into finding a way to get another few inches between the bed and the truck - possibly replacing the king pin assembly in the damaged pinbox.
I may have to go that route, but if I do that, I'll probably haul it up to denver (where is where I live). I've met a few guys who know welding and they can 'hook' me up.
in a perfect world I find a guy who knows what he's doing and he's in santa fe - but if that doesn't pan out, I'll be looking into a replacement King Pin assembly and dragging it up to denver.