Watch E-bay for king pin reamers. I see them on there from time to time.

I did mine pins on the 37 last winter and had to take a lot of short hard swings due to the fenders. I could have saved a ton of time by pulling the axle and using a press or a big swing with a sledge. Going back was easy. Use lots of grease. It still only took a day of steady work. If you rebuild the steering box, which is a pretty easy job, get the bushings before starting! I rebuilt a 46 box and had to have the little end cap bushing made due to the odd outer diameter. The bigger ones are a standard size still in use and are only a few dollars from a bearing house. The rebuild steering box on mine made more difference then any of the other work I did. Joe