These were the old mounts. There was no lateral support at all.

 

The very nice 19 inch fan shroud had a 15 inch shallow pitch steel fan.

 

Maybe that's why there was an electric fan installed.

 

Details Details.

I machined new aluminum lower radiator fan supports with silicone pads good for 450 degrees.
The new upper radiator supports also provide for lateral support.

The 17 inch flex fan has 7 blades and should flatten at high rpm to maximize horsepower.