Aerodynamics & Diverting Wind Resistance ?

THIS guy has his grill blocked off.... Something I can do and keep the stock look IF it would help me .... ???? Opinions ?????
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You could seal off the grill like the diesel guys do in the winter.

Le bra ....
Some kinda quick bolt on bumper extension and cover the entire nose with a tight wind proof canvas....
Something like this but fill in the holes...
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I like the Le bra idea..........but it might be hard to find one for that flat checked girl:D

Another though would be to put some lover/blind behind the grill,...like you would have on a house or a window of a house.
Pull the lever and the radiator is blocked. go race. open up the blinds and drive home.
Of course that would have to be stronger them vinyl. Alu louvers would be cool, painted them black, and no one would be the wiser.