[Fordafan]

My kingpins are the original and a bit worn to about .810 diameter. I bought a 13/16 reamer off eBay (.8125 diameter). I replaced the most worn bearing first and used the other one as a guide, then replaced the other bearing using the first one as the guide. The reamer flutes are long enough to go through both bearings at the same time. The reamer in good condition cost me 35.00 + shipping. Worked for me.