[DavidG]

The engine numbering referred to in the DeAngelis book pertains only to V-8 and four-cylinder engines produced at the Rouge engine plant in the U.S. and not to those produced across the Detroit River in Walkerville, Ontario, Canada. The latter's production began and ended with a star (at least in theory) and started with a "C", etc. as shown on the neat chart that you provided above. The four-cylinder engines produced at the Dagenham, England plant were numbered from groups of numbers allocated from the number series used by the Rouge Plant so they began either "AB" or "B" depending on the point in time the engine was produced. This is also borne out by your chart.