Anyone recognise these valve covers??
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2023 C1 of the Year Finalist - Modified
2015 C1 of the Year Finalist
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The OP has the VIN derivative correct.
In 73, the VIN derivative started with a "1" to indicate the Chevrolet Division, followed by "3" for the model year, "S" for St. Louis, and then the sequential serial number. The VIN engine identifiers of "J", "T" and "Z", only appear in the full VIN number attached to the a-pillar, they are not found anywhere on the engine.
In 73, the VIN derivative started with a "1" to indicate the Chevrolet Division, followed by "3" for the model year, "S" for St. Louis, and then the sequential serial number. The VIN engine identifiers of "J", "T" and "Z", only appear in the full VIN number attached to the a-pillar, they are not found anywhere on the engine.
I had checked the C3 registry as well. A friend advised yesterday that the NCRS also has a register for orphan parts, if so and you have access to this then feel free to lodge this info to assist anyone looking for their original engine.