I hope theres more to the scoop or non scoop then shown. Right now, its not a scoop or a cowl. Don't mean to sound negative, but right now, you basically just have a carb through the hood with a big air cleaner on it. Top what you have with a scoop and your good.

Some say you don't get much flow over the base of the hood. But I ran a carb through or to the top of the hood as yours with no air filter, and the wind shear from speed from air flowing across the hood sucked the fuel out of the carb and sprayed it across the wind shield killing the motor. I hope theres one more pic of the rest of that scoop.