Jonny-Why not put that locker in the rear and leave the front open? That will be way easier on your birfs, and you have the stronger axles in the rear to hopefully deal with the shock loading of that type of locker.
3 Birfs in a weekend is a message you shouldn't ignore unless you just like changing birfields on trail runs.
And unlike Tojo, I think the rust is fine. There is too much to fix now. One day, you'll get a new truck and can just swap over the good parts.
x2 on putting the locker is the rear. If I ever get a locker its gonna go in the back and thats it. I don't want anything screwing up the turning and the front is already complicated enough haha
I always wonder why this site wasn't named IH8RUST.
Nice pictures!