Here is a link of
my Cobra at 105 mph with the closed GoPro housing and suction cup mounting in the shortest position. Wind noise is terrible but I don't really care, it was open road racing, not napping. If you want good audio you will only get there with something like the EVO with an external mic, properly shielded and positioned out of the wind. Or you could just overdub ZZTop over all your videos.
Let us know how it works out.