Well, not entirely true, I drove around quite a bit, but for daily driving, the front hubs should be on 4x2. Otherwise you get an annoying click and an occasional chirp. As for the install, it isn't that bad, mine was just so rusted, and I had never done anything like this, it was a PITA. I could do it again in 1/3 of the time.
Go for it!!! Makes it a whole new truck!