What year is a Chevrolet 10066061 engine block?

The engine code 10066061 doesn't directly translate to a single model year. Chevrolet uses complex casting numbers that incorporate information beyond just the year. To determine the year, you need additional information, specifically:

* The full casting number: The number 10066061 is likely only a *portion* of the complete casting number. The complete number, usually found on a flat surface of the engine block, will contain more digits and letters.

* Other engine markings: Look for other markings on the block, such as the engine family code (e.g., L99, LS1, etc.).

With the complete casting number and potentially other markings, you can then use online resources (like forums dedicated to Chevrolet engines or parts databases) or consult a Chevrolet service manual to identify the manufacturing year.