The 6 6 is an assembly date standing for June, most likley, the 16th or 26th. (There appears to be a digit missing from the stamping. Otherwise your engine would have been assembled before the block was cast on 6-11.)
(( or are you saying the car's scheduled production date is 6-11? That would make sense for an engine assembly of 6 6 ))
The HP means it's a high performace engine assembly, compared to a non HP 440, and the 2 means it was assembled on the second shift.
The stamping only signifies an assembly date and nothing else.
the -7 after the 440 is a core revision code meaning the original casting core was revised six times since the original.
Edited by 69CoronetRT (10/14/08 07:46 PM)
1969 St. Louis plant VINs, SPD, and VONs.
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