Ahh, Frank, the stream of rare English brings tears to the eye...Surely
you're a Monty Python fan?

Several months ago I subscribed to autospeed.com and found it the best $50
an automotive technofile could spend.  Their archives are a truly
astounding collection of technical information well suited to the vanagon
community...how to do cool things for a modicum of expense. (There's a
fancy word too)  If I recall correctly, they used a nanometer to find high
positive pressure zones to locate an air intake on the front of one of
their cars.

Just curious, did you look at perforating the metal panel to the right and
left of the rear license plate?  My guess is that it would reduce under
bonnet (and yes I'll have crumpets with my tea) temperatures significantly.

I guess I'll have to go searching for your intake musings...I was wondering
about the same issue.