For reference here are a couple of photos of my ERA showing the fully shrouded radiator (from the front) and the vents in the wheel wells to help remove air from the engine compartment and vent heat from the header pipes.
Please excuse the bugs as the car just went up for it's winter cleaning. As you can see the entire nose is closed off so incoming air goes nowhere else but through the radiator.
Wheel well vents. Again, pardon the dirt.
DonC