I have seen another one of these years ago. If you look at the spread between the carbs this fits the two Holley 600 four barrel intake, like the one Mopar Performance selld today. Now that I see this air cleaner again it dispells the rumor that the two holley system was only a marine application. It might have been used that way but this air cleaner clearly shows it was used on a car as well. That three inch height is interesting. I wonder if that's what I have here?