That sounds more like a everyday 425 hp 427 to me. I would think it would have more L-88 or ZL-1 parts on it but it doesn't. The date codes are about as close as you could come to a "COPO" and the intake is a 425 hp with too early of a date is it not?
sounds like a CE motor or one that has been decked so that it would have the "Correct broach marks" ????
