Tip; I had the exact same set-up on my Ramjet 502 and used a Flex-A-Lite twin fan set-up as well. Rather than stick the probe between the fins, I simply removed a plug from one of the heads and adapted it for use with the 1/4" diam. thermal probe which connected to my Flex-A-Lite electronic controller. This controller is amazing in that it will soft-start the fans and spool up fan speed based on temps. As well, if the controller receives a 12v signal which indicates that the a/c compressor is on, it sends both fans into top-speed.
You're right about what the flaps are supposed to do, had 'em on my Flex-A-Lite as well. I suppose if the upside-down set-up isn't affecting you, it's ok to ignore it. But if you're ever stuck in Arizona in traffic in a heat wave and the engine temps start to climb, you'll know what to do
