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date code

  1. Vintage Mustang Forum
    Knowing what we know about Ford engine date codes, a matching numbers 390 engine block to a car built on 11/10/66 would be a 6J or a 6K block. Even better would be a set of heads with 6J or 6K and a month date maybe a little before block date. Ie; 6K18 block with a matched set of heads dated...
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