[Volfandt]

I used the ground activation sender/relay method on my 49 GMC. Uses a single wire to the sender which I mounted in the water jacket passage in the intake manifold.

Also made up a home made shroud for the 2700 (rated) CFM fan. Been thinking about adding a couple slats in the corners that would flap open with increased air flow through the radiator via increased speed. They'd remain closed at idle.