Well, I never had any issues with my TTB-50, to be honest. I did have a very good alignment shop align it, after I had to replace one ball joint, when I bought it. And I can tell you that my tires have worn perfect!
The tires on there are about bald now, after 60-70,000 miles.
But, I am one who is going to do the swap. Actually, I will be doing it within the next few week(ends).
IMO, the cheapest starting point is to find you a complete F350 truck. That way you can rob any bracket that you need, and part out the rest. That is what I did, since I kept finding everyone wanted 'about' $1,000 for an axle, which still needed rebuilt. So I bought a whole truck for less than that.
Recently, and very slowly
, I have been rebuilding my axle. There is still alot of cost in rebuilding one, to be quite honest, but I am replacing everything.......such as:
All ball joints (uppers and lowers),
U-joints (axle and driveshaft),
Inner seal (behind differential),
All oil seals (near knuckles),
All steering components (tie rod ends, drag link, etc.),
Axle lube (went with Royal Purple synthetic).
Last year I already installed new rotors, calipers, etc....so I will just swap mine over. So basically I will have a new axle, rebuilt.
But back to your question, I wanted to do the swap, because I might be adding a small lift in the future. But doing this will let the truck sit a bit higher, with all of the 350 stuff, since mine is sagging right now.
Are there write-ups....sort of. Lots of others have done the swap, and there are gobs of pictures out there.
Do your homework to what axle year you want. Some year axles use ball joints, while some use king pins. Whatever your preference is. But ask away, and I'd be glad to help!