Hmm, I've been contemplating a gear swap on my 04 superduty. I ordered it with the 3.73's, but I'm wanting the 4.10's or even 4.30's, although the wife thinks the 4.30's are overboard. I'll possibly be asking for help. I like to do my own work, but I've never done gears before, but I only need to be shown once!
if you know some one in parts at a ford shop ask them if you can make a photo copy of a couple pages from a factory service manual. it explaines every thing in detail, great detail not like the parts store manuals.