If it were any bigger than the hood scoop would have to be bigger to cover it.
Kit cars can use any hood scoop they want.
The originals all came the same way unless there were some mods by the owner. If you look at the old pics of the comp cars at Shelby in the airport lot from 1965, you'll see the same.
Remember the ad in the for the creme that if rubbed on your D__K it would make it bigger? Then wouldn't your hand get bigger too?
Same theory..