Serial numbers are on a plate on the right front door hinge pillar.
6 cylinder on crankcase to rear of distributor. Engine numbers were FA-1001 to FA-825234
Numerical prefix in serial indicates assembly plant as follows:
Tarrytown, New York
St. Louis, Missouri
Kansas City, Missouri
Serial numbers: 2 digit prefix for model year 48=1948
followed by a dash and 4 numbers indicating body type. These 4 numbers could also have a Letter suffix indicating trim or equipment options. Serial numbers for Stylemasters were FJ-1001 to FJ-30590, Serial numbers for Fleetmasters were FK-1001 to FK-81603. (Fleetline was a sub-series of Fleetmaster and included in the Fleetmaster numbers). All Fleetmaster body type numbers began with 21.