Since you are kind of starting from scratch, you can suspend the front end how ever you want. You might even consider doing leaf springs. If the stock 4x4 stuff will bolt up, that will will be your best bet though. I have a Superlift and I like it. It has served it's purpose well.
If you do a divorced t-case it will simplify things and open your selection up. But make sure you get an axle with the diff on the same side as the t-case you go with, unless you want to do duel cases.
This sounds like a cool project. I hope it goes well for you.
2005 Dodge Ram 2500 QC, 4x4, 48re