This is my ford taurus twin speed fan 4500 cfm i am not selling you anything but i can tell you it is been working since 2010 with termostat switch for 2 speed fan .
If you plan on doing it manual you are comitting suicide .
That particular truck was sold 4 some odd years ago. No idea if its even still on the road.
That was also the only rover I've owned that I did that conversion. the main reason why I did it is because the fan blade sheared and went through the hood.