'71 Demon with 360. I have an aluminum rad with electric fans and shroud. I want to take the electric fans and shroud off and replace it with a mechanical fan with a clutch because it gets hot on the highway (not in town). I think the flat shroud covers too much of the radiator.

What size fan should I get? I see a lot of 18" fans with 7 blades, sound about right? Would I be able to find a "stock" shroud for it?