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I have a 390 block that has a 7 F 12 date casted in on the driver side front, then another date 7 G 6 stamped on, which is on the smooth tag area just above the casted in date. Is this a normal thing Ford did ?
 

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I have a 390 block that has a 7 F 12 date casted in on the driver side front, then another date 7 G 6 stamped on, which is on the smooth tag area just above the casted in date. Is this a normal thing Ford did ?

(Cast) 7 F 12 June 12, 1967 is the date that the block was cast.
(Stamped) 7 G 6 July 6, 1967 is the date that the block was assembled.

Yes, it is a normal thing.
 

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Thanks for the reply, I figured a cars actual build date would reflect on the stamped block date. But didn't think there would be two different dates. Thanks
 

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The blocks stamped assembly date preceeds the car build date typically anywhere from 3 days to 3 months with 3-8 weeks being an average range. Body production plants play into this as well with engines having to ship farther for some car lines. The block cast date and assembly date seem to be in the 5-20 day range typically.
 
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