If you are sure the play is in the steering box, the box can be adjusted, there is an adjustment screw on it to reduce the amount of play.
Do a search for the specific instructions, and remember not to make it too tight, otherwise the box will wear itself out quickly.
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record