I have a 47 1.5 ton with steering box issues. The original box uses a block with ball bearings and a worm witch is worn badly. I got a box off of a early 48 two ton but it is different with a worm and rack. Both need rebuilt witch one is the correct box for the truck witch one will work the best. The box off of the two ton has less wear needing only bushings and new seal will it work as well as the box with ball bearings.