Aerodynamics sort of

I ran for years with front end just like yours, headlight holes providing “air” I decided to start taking mine to a few car shows and had to install some headlights for driving on the street if you will. Clearly not scientific by any stretch but I found zero benefit and or zero disadvantage either way. Headlights in or out, zero change in time slips. Please note my car is not fast and in a true serious race car there may be benefits one way or another. I run consistent mid tens and have no desire or need or cash to run faster. For real racers there is likely a benefit one way or another but for me literally no impact.