Thanks Gents! The pan on my 65 has the foam and is snug on the underside of the hood. The inserts have been completely opened up.
This weekend I will log AFRs with and without the pan. My guess is the inserts, even though opened, are not allowing enough air in and the car will run richer.
I also know this is a low pressure part of the hood, so there is actually no real ram air affect. I had thought about running 2 intakes from the front grill up to the pan, but could not get over the fact it would look ugly.
1965 GTO Convertible 3 speed tri-power drum brakes originally
400 cu in with tri-power
4 speed Muncie