What is hp of casting no 10066036 gm?

The casting number 10066036 typically corresponds to a specific engine block or component from General Motors (GM). To determine the horsepower (hp) associated with this casting, you would need to identify the engine it belongs to, as different engines can have varying horsepower ratings. Generally, this casting number is associated with small block engines, which can range from about 200 to over 400 hp depending on the specific application and modifications. For precise information, consulting a GM parts database or engine specifications would be necessary.