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GM engine block # 3970010 was used as early as 1968 on some 327ci engines. From 1969-1979 it was a 350ci engine. It could be a 2 or 4 bolt block used in cars, trucks and even corvettes. You can also find these blocks with a "Mexico" stamp on them near the block ID. It has been said that these are high nickle content blocks and may be stronger than others.

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13y ago
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Tracy Davis

Lvl 1
2y ago
How do I find out exactly what year model what engine what horsepower it's got

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Q: What are the specs on casting GM Engine No 3970010?
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