Jomichael, My '59 is not a napco,but was converted to 4wd by PO. It has a steering box, and drivetrain out of a '74 K10. The box is mounted outside the frame rail with some funky hardware but it works. My front axle is a Dana 44 so I'm sure it is diff. than yours, but the power steering is much appreciated when tring to turn the 33"s! I'm hoping to clean up the steering shaft and U joints in the linkage soon, perhaps with stuff from Flaming River, maybe they have something for you. Good Luck!!
Jeff