If the code cannot be found, then identification can also be made by looking at the case measurement from front to back, not including the bell housing or rear pump section.
LARGE CASE = 10 7/8" Case Length (1958-1960)
or
LARGE CASE = 11 5/8" Case Length (1961-1965)
PBB - 1958-1960 Ford, Mercury, Lincoln 383, 410, 430
PCA - 1961-1965 Lincoln 430