I did use a divorced transfer case. The Nissan 720, made from 1980 to 1986 had a divorced transfer case. There is a thread which includes more info and a picture a few days old called "300TD 4x4 hybrid" or something like that. I do have a file I can send you with more info. Drop me a note to
broth@sanjuan.edu and I'll send it to you.
I have been reading about Ridge's intercooler. That is something I have considered. I still want to know about adding propane to a 617 turbo motor though. I've heard that propane can give you 20-30% more bhp.
I'll check out those sites.