if you are planning on lifting the truck, you could factor in the price of the lift. then you will be breaking half-shafts left and right (pun intended).most of us have spare parts off older trucks or can get em from our buddies cheap. One thing that I dont think has been said yet is that his 10 bolt wont work, or maybe his transfer case wont work depending on what he wants to do. so if I had a front end already (ford) and wanted to do a lift Id probably just do a SAS. because breaking half-shafts gets old, the minute you put your ifs truck in 4wd it throws the alignment off so you have to align em often or get your tires prematurely worn. the newer trucks have more luxuries, to get these in an older truck you either have to add em or get one in really good shape and spend just as much as a newer truck with an SAS. just my two cents
Dustin