[BonzoHansen]

Your car is really a bottom breather. Notice how Pontiac selaed the nose up ~84/85? Look at GTAs. Those vents matter not.

If anything, the air damn under the nose is more important. I forget the application I used to order a new one for my 82. I remember looking at other f cars - some had larger ones than others (the stock on on mine was like 2", I got one like 5" tall). I had a big radiator, an electric fan out of an 85 (185* on switch, 180* stat) and the bigger air damn and the car never ran hot. Ever. Simple and effective.

If anything, you might want to seal up between the nose & rad support so no air escapes around the rad. But that is probably way overkill with a mild setup.