Good on you Sleveritt. Stick to you guns.
35 years as a mechanical engineer designing (among other things) all sorts of cooling systems for engines, transmissions, gas turbines, and hydraulics, should have taught me a couple of things about cooling and air flow.
Just have the guts to let us know the real results when you do a long test drive through the hills.
And as I said before - good luck, I hope it works for you.
PK