Cowl Vent Grille Panel. This is what the Cowl Seal Attaches To.
Chevelle 1964
Chevelle 1965
Chevelle 1966
Chevelle 1967
El Camino 1964
El Camino 1965
El Camino 1966
El Camino 1967
Reference: cowl vent panels, cowl panels, firewalls