Thread: 4 Bolt Block What is it?
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Old 03-02-2023, 04:03 PM
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wase wase is offline
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Yes I believe it's a 400 block,. XH code. Stamped # looks like 9790071. Date CO39. It came in a 1969 Grand Prix.
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Last edited by wase; 03-02-2023 at 04:11 PM.
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