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The way to determine the engine size, horsepower rating, and transmission mounted to it is the engine suffix code stamped on the block in front of the passenger side cylinder head. It is a three letter code. For example, an LS6 454 with a 4 speed transmission will have an engine suffix code of CRV. The VIN code will only tell you if the car had a V8 or L6 installed from the factory, but it won't tell you WHICH V8 or L6 was installed.

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9y ago
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Q: How do you determine engine number on 1970 Chevy Chevelle?
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