Steering box will pop

[Tberg47]

So on my project truck I added 4 in suspension lift and a 3in body lift with 36. Since I added all this and rebuilt the steering box when I turn it right it will pop before it comes close to stoping. Do I need to adjust the pitman arm to get rid of it?

[Edemich]

Sounds like your frame may be cracked.  Check the area behind your steering box.  This is a common flaw in these trucks and it will only get worse with the bigger tires. 

There are bolt on and weld on kits to fix this.

I do not think there is an adjustment to the pitman arm.  If you haven't added a taller steering arm or a dropped pitman arm this may be causing the steering box to bind because of the bad geometry.  Check the frame first! And report back.