I have a D70. It's not really a "desired version", but if you were gonna do a complete build on one it would be a starting point.
Here's what I've got:
came from: 99 Dodge 2500 w/ V10
has 32 spline axles and a limited slip carrier
has 3.55 gears (...or something like that)
I'm driving to Ft. Worth this weekend, so talk fast if you're interested...
Marv