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Buried deep in the Petersen photo archives was this GM press photo of a "1970 460-hp Turbo-Jet 454-cu. in. engine." This is the triple-carb LJ2 that never made it into production. To keep an editor from goofing up and running the photo in a magazine, someone wrote "Don't Use!" in grease pencil on one side of the photo and "Not for Release!" on the other. Oops.