Oct 8, 2023, Kingpin Update - King pins definitely need replacing. Hopefully the one second video I uploaded shows how loose they were, however, the wear seems to have been mostly in the bushings. Once I removed and cleaned up the king pin I pushed them back into the axle. They fit snug with no movement at all so I know I don't need oversize king pins. Have them on order and will start putting back together once the coating the chasse is done.
Looks like you have to download the video to see. There was a ton of play.