BE is for the '60-'62 passenger car 235 with PG and PS (which would have hyd. lifters). The other numbers are the engine build date (0301=March 1). No exact year is given in the serial number. To pinpoint the year, look for the block casting date code on the block near the starter. This code is a letter followed by two or three numbers. The last digit of the date code is the last digit of the year. The build date is usually a few days after the casting date.
