According to the attached. 3/4 ton thru 1-1/2 ton king pins are the same. They are different from 55.1 though, which may be what you're finding. They should be available from the usual vendors. Here's one source.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
