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Here is a real-deal '69 COPO 9561 L72 425hp 427 Camaro engine. Somewhere between 512 and 700 of these powerful Camaros were sold. Putting a 427 into a '69 Camaro rates as one of the top owner update modifications of all time. This car was also one of the scariest of all time to drive on the street. Some 72 iron 427 COPOs 9561 are documented as alive and well today.