Do you have a donor truck? A similar year (87-97) truck with 4wd? If so then it is actually a very easy (virtually bolt in) swap. If the donor truck has the same transmission then it is even easier. Major parts needed include:
Front axle
Front driveshaft
Transfer case
Trans crossmember
Tranfer case shifter
Front springs (F350 4x4 are leaf sprung, I believe 2wd truck are coil spring)
Having a donor truck is really the only cost efficient way to do this swap, but it is very do able.