64 Valiant customized front valance

The picture I posted was just for illustration purposes.
The car has the 64 standard Valiant grill.
I had considered just filling in the whole like the old Gasser pics above but was afraid it would restrict airflow to the radiator. By my estimate about 40% of the air to the radiator comes through that valance opening. It's a street car, in balmy South Florida.