How to adjust the new steering box?

[JEEPdriver]

Hello everyone
I have a rebuild DODGE steering box an want to change with the old Leasing TJ box.
Now how can I found out the right adjustment of steering wheel and front axle?How can I found out that the new box is in the middle of the way?

 

[hosejockey61]

Before you install it, rotate it all the way to one side and then back to the other counting the turns. Divide by two and you have the center. Understand that a TJ pitman arm will be slightly offset to one side when the box is centered.