For the serial F1216A:
F=Flint
1216=engine build date=December 16
A=regular production 235 passenger car engine (w/3 speed), '57-'62.
The A suffix was also used for the '63 & '64 230 car engines.
The year will have to be determined from the block casting date.
Curt
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1953 Chevy 6400, 1957 Chevy 2dr Sedan
--"Mediocrity is easy, the good things take time"
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