Here is how I'm mounting the fan on the radiator. It fits PERFECTLY and all I had to do was weld on some thick rails along side the fan on the sides. It worked out so nice. Tomorrow will be the positioning of mounting tabs for the whole thing. My mission is just to make it all as solid as possible. But of course I'll be using some sort of rubber/poly material to calm down the vibration.
And you can see the aluminum strip that is placed on the ends so that I could mark them, cut'em and weld them on.