On my car, the hight of the scoops nostrils sit below the layer of "dead air" that surrounds the car as it moves thru the atmosphere. For a scoop to really have any real "Air catching ability" (I won't use the term "Ram effect") it needs to be positioned above the layer of "dead air" which flows about an inch or two above the bodys surface area. Or be positioned as far forward as possible (which would then act like a wide open window in a hurricane).
For a more effective scoop design to actually grab enough cool outside air to create any measurable under hood cooling, I'd suggest using the scoops off of the following cars.
69/70 Boss 429 Mustang
69 Hemi Dart/Cuda
70 Firebird Formula
70 AAR Challenger
69 Rambler Scrambler
65 Comet A/FX
69 Hurst Olds 442
Just to name a few.