Due to an engineering design flaw, 1951-55 Kaiser distributor mounting adapters have been known to crack on the "foot" of the casting. My car stuff is still packed up so I can't double check part numbers but I believe that the casting interchanges between these model years.
Jim Betts has complete parts list books up on the CircleKF website he has. I would suggest checking the part in the March 1953 release of the Kaiser Parts List Supplement to the Orange cover (illustrated) 1951 Kaiser parts list & also the Green cover 1954 non-illustrated Kaiser parts list to verify that the part numbers are the same.