4 speed to auto swap?

[Slick71]

I'm thinking about swapping my 4 speed for an automatic, Turbo 350. I know everyone likes these old 4 speeds, but I'm ready for a change. I've currently got an NP 205 transfer case in my 4X4 and am curious how much would need to be changed? Will the 205 bolt directly up to the turbo 350 that I'm looking at? I think I'll need a new cross member, right? ....and of course I'll need the brackets, cables, etc. Will driveshaft lengths need to be changed? Any ideas or help is definitely appreciated!