Why go so high tech? Can't you pick up a blower like they use in boats and pick up the hot air from the engine and blow it out the back? You could even get creative and only have it come on at idle but I don't know what sensor you would pick off that signal.
LDUB - I thought I was the old fogey on this forum at 47 & one grandkid. Looks like you got me beat. How does the dark side of the hill look?
Willy - Yours looks great. How did you do your hood scoop?