You might want to call Quigley.....back in the day they had a propriatery adapter to fit the standard 2wd E4OD (simply removed tail housing) and put the adapter in and bolt to a Borg Warner.....drive shafts may need to special length, but would have been custom for you anyhow. I just got a 1990 with an E4OD. ...and we spoke about the build sheet and that adapter. Ask for Sabrina at Quigley. Part numbers may be QTTX-891 (extension housing) and QMD-4130678 (gasket).
I saw your post on where a two wheel drive can go.....I have tire chains, tire cables, and emergency chains for nearly all vehicles here that we own (forklifts, tractors, trucks, cars, vans,) Chains can make 2x go just about as well as 4x and either one , get you out of an emergency.