Join Date: Dec 1998
Location: Valley of the Sun, AZ
My 69 has never had the engine out of the car, so I don't know what the cast date of the block is, but I do have the following dates:
Engine assembly date 12/30/68
LH Cyl head cast date 12/27/68
RH Cyl head cast date 12/20/68
LH Exh man cast date 12/27/68
RH Exh man cast date 12/7/68
Intake man cast date 12/13/68
I remember 'rich r' from NJ had a timeline on the cast dates for the components of the 396 in his green 70 SS396 a few years ago, and it was similarly close. The 327 in my old 69 Impala was the same way. Not all cars have the dates that close, but it is not unusual to find them that way.
That said, just because the block cast date is close to the car's assembly date does not make it even 'likely' that it's the original block. Possible, yes - likely, no.
69 SS396 Convertible L35 M40
69 SS396 'Post Sedan' L35 M20
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