I'm also planning a body lift and very likely hydroboost, so I'll need new brake hard lines anyway, and I'm planning to unbolt all of the hard lines into/out of the CAB and bypass the ABS hydraulics and run new master cylinder lines directly to the chassis, and unbolt the CAB unit and toss it. And as the t-case signal is gear-driven (in the t-case) I can adjust the actual speed signal with different sized gears (bonus again).
They've done this with full size Rams to the theory is sound for same-same application in a Dakota or Durango.
I am planning to get an Atlas transfer case which I can order with a speedometer provision in the tail housing (bonus), and after talking with the techs at Advanced Adapters it appears I can simply tap into the VSS (speedo signal) output wire from the CAB, which will essentially 'replace' the rear wheel speed sensor signal, and the speedometer and cruise etc will all still function 'normally'. In the process of the SAS I'm going to delete the ABS entirely from my truck. When I do the SAS (solid axle swap) I'm going to lose all of the factory speed sensors, which will of course terminate speedometer signal to the dash. Alright - so according to the FSM the Rear Wheel Speed Sensor provides Vehicle Speed Signal (VSS) to the CAB (Controller Antilock Brake) and then on to the PCM.and ultimately on to the speedometer.