Not sure if i understand this thread, but the 427 Cobra here in the UK at the beaulieu motor museum has larger than average side vents. It was restored by Autokraft many years ago and features many odd non-standard items.
Some where i put up a bunch of pics on this on the web somewhere, but I can't remember where it was, and after 1/2 hr searching, can;t find them. But anyway here is someone else's pic...
Beaulieu Motor Museum