A starting point is to check the manufacturer's plate on the starter motor with the brand and model number of the starter that you should have. In your case, you should have a Delco-Remy brand starter, model (or part) #1107787 if manual or overdrive equipped, #1107788 if equipped with Hydra-Matic. 1953-55 Kaisers used #'s 1107125 with manual transmission and 1107126 for automatic. These have different rear engagement assemblies. The 1952 type is a barrel layout, the 1953 and later has the "Follo-Thru" layout. There is no indication in my factory service materials that the two types are interchangagle, although they may attach ok to the unit. The manufacturer tag and the shape (as noted in K-F Shop Manuals, especially the 1952-53 supplement to the 1951 Edition) of the rear unit as a starting point. Otherwise, you'll probably have to remove the starter motor and look inside.