04-27-2013, 08:38 AM
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CC Member
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Join Date: May 2004
Cobra Make, Engine: TBD, other is 67 Mustang GTA 390 Convertible w/air,
Posts: 88
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Not Ranked
427 Block
As far as I know the 427 blocks cast for aftermarket by Ford use did not or might not have "casting" numbers on them, just the date code casting. I've had two '73 blocks that do not have casting numbers. I don't know what year was the last year for production usage of the 427.
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