Many people will tell you not to do it the way i did, but so far it has worked great for me.
I just pulled off the caps, bought a tap and tapped them. I did add some material to the end cap for added strength but this was very easy to do and i didn't even remove the box. Im running 42's fully welded and can still turn when full flex with all weight on the front end (get wedged in between rocks and it stops but it is just assist). I am very impressed on how well it works and it cost me about $150 for everything.
