V- Thanks for the links, I'm amazed that the HDTBs and shocks made that much of a difference on your rig.
Tom- Thanks for the heads-up on the supply; I checked, and they say they have some in stock.
Jon- Did you have HDTBs before you went all Bad@ss?
And what does the install entail? Is it just a matter of supporting the frame and axle, and then unbolting the TB Nut? I would imagine that there is a sweet spot in the distance that the axle is away from the frame that would put the TBs at zero load, and how do you find that spot? I would think that if the TBs were unbolted and still under any kind of load (either pos or neg) things could get a little sporty; and then the install of the new ones may be f'ed up as a result.