the tommy-kiara ZZII was mid engined and 4wd. RB26 installed backwards.

the problem i can see with adapting a front mounted 4x4 system is the bias, like this one i found that is the Nissan Mid 4 - Mid engine AWD prototype.

http://zhome.com/History/Images/MID4_8.jpg

its just reversed so the front wheels get 60% :/