According to AUTOLITE It fits:
1956-1957 CHRYSLER PRODUCTS STANDARD TRANSMISSION & OVERDRIVE
1962-1963 CHECKER STANDARD TRANSMISSION & OVERDRIVE
According to CHRYSLER (MOPAR) It fit:
1955-1959 CHRYSLER (MOPAR) w/ PRODUCTS STANDARD TRANSMISSION & OVERDRIVE
The part number may have been later superseded to fit other models, but this is the only correct application in the original listings.