2500CTD

Anyone convert their truck to 4wd? What are the types of 4wd systems? Either one better than the other? Also does the truck computer need to be changed? I do not want another truck payment, since its paid off, and I'm not in a hurry either, so I can look for a donor truck. I have the FSM as well. What are the different styles of front ends/ transfer cases that were avail? Also besides the obvious parts, anything else 4wd specific, like the instrument cluster or.....