I'm not sure yet about the center sections...
The 2.47s were not that easy to find, and I really just wanted to buy the completed 3rds from a reputable vendor, but since none of them had used 2.47s to build with it made the whole process complicated.
I seem to recall reading that the Ford 9" 3rds are one of the easiest to setup... so at this point I will probably just give it a try myself. I bought a dial indicator about a year ago, and I don't think there are any other tools needed (case spreader, etc).

I figure if I can get them assembled and get a couple photos of the gear pattern with that yellow paste someone on here will be able to tell me what needs changing / adjusting.
From what I've learned, the stock case is the worst... the aluminum cases are stronger than stock, and the aftermarket iron 3rds (with extra ribbing) are stronger still.... the Nodular Iron ones are supposed to be the strongest? I'm not sure how much real weight savings is available by going to alumnum vs. iron, and if the weight savings is worth the risk of using a lighter duty part in such a heavy truck.
The other recent breaking news was the release of the Yukon Gear "Zip Locker" for the Ford 9".... it's basically an ARB Air-Locker, but the internals look to be a lot beefier, and the air pressure is used to "UNLOCK" the device intead of locking it.... so if you were on the trail and blew an airline, or lost a compressor, the axles would actually stay fully-locked. That might be the difference between driving out and walking home!
It only comes in a 35-spline version, so that might change the bearing size on the 3rd member (3.062" vs. 3.25"?). I know there are two sizes, and it seems like the larger one gets used on the high-spline count axle shaft stuff.
Also need to get a pinion oiler from Currie since I'm running the axle upside down... so it doesn't starve for oil. And I heard that they make a solid spacer kit that replaces the crush sleeve so maybe that will make the setup a little easier (even if it costs a few dollars extra).
Anyway... lots of unanswered questions remain, but I guess that I will figure it all out eventually. Setting up gears is kind of like another "TIG skills" thing to me.... I've wanted to do it myself for a long time, but never had an opportunity to learn it.
-G