The number 460777 stamped on a Chevy engine block is likely a casting number. Casting numbers identify the specific engine block casting, not the engine's complete specifications. To determine the exact engine type (e.g., 350 small-block, 454 big-block, etc.), you'll need to cross-reference that casting number with a Chevrolet engine casting number database. These databases can be found online through various enthusiast websites and forums. You'll need to search specifically for Chevrolet engine casting numbers.
Simply having the casting number alone won't tell you the year, model, or specific engine variations. Additional markings on the engine (such as partial VIN numbers) might provide more clues in combination with the casting number.
