Pete,
I'd like to see how you did the trunk. I've been putting off engineering that prop and I'm getting tire of using my cut off broom handle
. The Black magic fan comes with a rubber gasket on the shroud which provides a nice tight seal against the radiator. The control box on the left side of the shroud has the fan temp sensor capillary tube and the control for adjusting when the fan comes on.
Have a nice time off,
Mike