There's a new Tech Tip for you on those darned king pins and bushings.
"How to fit new king pins and bushing." A post was originally made by Grigg "Grigg" Mullen in May 2016 when he was the Engine & Driveline Moderator. With some later input by Chris "SWEET" Sweet (Tech Advisor), and some additional images, the post is now in PDF format for a easy read / easy print out.
"This procedure was written for 1957 3100, but it applies to the older trucks and likely newer ones as well."It can be found
HERE in the Driveline Tech Tip Forum.
Take a look, hope it helps.