All new seals and replacement bearings. It's only like $6 more for the entire kit so I couldn't justify only resealing it while I had it off the truck.
I realize I'm a little late to this but I recently rebuilt my saginaw power steering box. The kit was around $25 from Rock Auto. It's a fairly straight forward process if you're comfortable with your mechanical abilities. I rebuilt mine on the kitchen table in one evening. Box feels much better...