I thought that the point of the ZL2 hood was to accomadate the higher clearance of the 427 with high rise intake, which is why they were standard on all COPO's. I don't recall ever seeing even a dealer swap 427 with the flat hood. Too bad you can't really see the engine call out on the fenders. Doesn't look to me like the 6 cylinder fender that was standard on COPO's.
Andy