The paragraph in the Gas Coupe rules (5.D.3) that starts, "The following items shall be retained..." includes parking lights. As long as your air intake doesn't contribute to "blocking of air flow thru the radiator", I'd think your fix would pass.
But, as always, Your Mileage May Vary, so consult the appropriate SCTA official, Bobby Sykes Jr. I'd guess, contact info in the rulebook.
Mike