Hood scoop to big?

I would mount the scoop facing the windscreen; it gets high pressure air & it takes what it wants, not what is forced.
The percentage HP gain from ram [ forced ] air is very small; only about 1.2% @ 100 mph.
The HP gain from the colder air v the hot under hood is noticeable...& free! And at all rpms/speeds.
Dropping air inlet temp [ & increasing the mass of the inlet air ] is worth about a 1% HP increase for every 6*F drop in inlet temp. Free hp. If you can drop the temp 30*, that is a 5% HP increase. It also helps to prevent detonation. I have aluminised fibre glass cloth covering my air cleaner & air box assy to keep the air even cooler.