[Low69CST]

I would spin off the engine fan and see what happens. That would be easier than making a shroud. If engine tempature is more consistant but still hot, go to a bigger fan. You said you were thinking of putting it on the outside of the radiator, you do know you have to get a different fan for the inside or outside of a radiator right? Inside ones are pullers and are the most efficient, outside ones are called pushers. Do you have a pusher on the inside?????