you can make it 2wd with the auto for now , and eventually find a old devorced transfercase and put it in there and custom make 3 driveshafts .

im guessing you wont have power with a 616 n/a to use a OD most of the time even if you had one .

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current fleet
Ford f350 dully 7.3L 1990 . ats turbo , zf5
Mazda 4x4 b2600 with 617 20-26 mpg
Past fleet
1983 240D w123 232k 25-30 MPG
1984 Ford f250,1979 ford 150 300-6 (sold@ 251K )
81 300D, 79 240D , 2x 76 300D ,74 240D , 2x 89 grand prix , 85 grand fury , and several other fords

Custom machine shop work ..