whats your time worth?
doing this swap, assuming you have the tools, knowledge, and a full parts jeep in good running order to grab parts off of will run over 1000$. sell current jeep, add 1000$ you were going to spend and get a 4wd.
this is NOT an easy task that you an do on a daily driver type of vehicle. just sourcing parts will be a pain. can some of us do it in a weekend? maybe. will it likely sit in your garage half completed for months at a time? yes.
you will need a 4wd transmission, tcase, front axle and who knows what kind of driveshafts to connect it all up. (lengths could be different) you will also need the computer/TCM stuff as well.
this undertaking is the definition of 'not worth it'
92 YJ ~ back at it
RIP 95 ZJ ~ 33s built/longarmed/locked/awesome Feb 2014 ZJOTM winner