Yes, a AWD TC that doesn't cost 50 Grand would be desirable.
I dream of one with a lockable Torsen Differential with a standard ratio of torque diversion 35/65 Front/Rear unlocked.
Best would be just an exchange of the internals of the NV 273 or the newer BW unit, doesn't matter as they are interchangeable.
Priced within the range of an ATLAS TC I would probably buy it.
I would like to hear more of the info you have on the division between front to rear. I've been looking at a fluid coupler to incorporate in the front output that could give a dynamic offset and possibly be electronic valve controlled proportion.
I've never messed with an awd conversion but I've owned several of the 2G Mitsubishi eclipse awd cars with some power adders. Lots of fun and no worries when it starts raining.