The 1947-1953 ignition switch is different from the 1954/55st ignition switch.

My postings in this thread are not pertinent - sorry.

Also, the 1955 and later foot-starter ignition switch is a different part number from the 1954/55st ignition switch (they also have a slightly different sized escutcheon ring).

Sorry about adding confusion to this topic; but, mine is wired "backwards" (right-is-off and straight-up-is-on), and it works fine: on/off/accessories and removing key with engine running. I do not remember if I am correctly using the accessory terminal (or, if I am using the "hot" terminal for accessories)? When I get around to fixing/checking this, I'll try to remember to post the results.