It's been awhile since I swapped mine, but I needed to change:
1. Shorten rear driveshaft...took it to a driveshaft shop and they welded it up no problem
2. I used the transfer case that came with the C-6 - NP205 I believe, not sure if you can use your current case...I'm sure someone knows
3. Needed to get a kick-down rod from an older F-150 so that downshifting would be possible.
4. Of course you'll need the shifting linkage from the C6.
5. There's a vacuum line that runs down to the tranny...don't think there was one for the AOD.
That's all that comes to mind right now, there's probably some other guys on here that know a little more about it. As far as your rear-end, that SUCKS. Time for some bigger axles???