Rock on dude! I would like to see this finished too.
But you have some problems to solve. Like Izwack pointed out. This axle doesn't have the gear toothed ring that your 8.8 did that provided your computer with the speed of the truck. But he hinted at a way to solve that.
If, I wasn't so in debt and had child support to pay, my truck would be radically different than stock. Maybe someday I can do the ideas in my head. But, for now they are just ideas and dreams. I need at least 2 years before I may have serious cash to spend on it and make it what I want. For now, I'm just trying to keep it running which isnt easy because its become a serious rust bucket for sitting idle too long. My Limited is in much better shape with more miles and being a little bit older than my Sport Trac.