Crossover steering questions.

[modblacksmith]

I am getting ready to convert my truck over to cross over steering. I have the 2wd steering box, but it needs to be rebuilt. Ive done a little bit of research but have come up empty handed.

First question is how hard is it to rebuild a steering box?

Somewhere along the line I picked up that you have to change the steering shaft little joint thing to a u joint style one? I need to know which one because of the splines.

Any info on this would be greatly appreciated.