L/R Series front spindles

a 110 5 on 4.5 hub drum will slip right on a 120 axle,
the axle beam is heavier, but the actual spindle part is the same, same bearings etc.

I changed my KB pickup from a KB 1 to a 3 and back again, rear axle was some work, but front was simply swapping hub/drums,

Correct Kevin. #4 in that diagram. I have found king pin and bushing sets but I would like an actual spindle without the ends chewed up where the outer bearing rides. In theory a guy could compensate for the wear since I have to figure out my own size anyways but nothing wears perfectly symmetrical and I feel like I'm setting myself up for further bearing failure in the near future