Thanks for the replies! The current king pins are not terrible, but there is some play in them. I don't think that they are loose enough to cause issues, but we are just planning ahead. 40 years ago I was a school bus mechanic for a fleet of about 100 busses. , I changed lots of them Bach then. Incidentally, our wrecker was a 1964 C-60, so this truck seems like old times

Steve

Last edited by 20Mercman; 01/10/2021 9:10 PM.