Hot Rods Fan on a Flattie

I am mocking up my build and realize I need the 49 Truck water pumps to align with the frame I am using. Since these pumps use the wide belt, I am wondering which fan blade to use. 4 blade, 3 blade or just go electric. I plan on modding a 4 core small block Chev rad so I know I need to move a lot of air.

 

Some might say not purist but what the hell?
I put an elec. fan on our 32 and 49 flathead powered cars. You can choose from a variety of sizes and etc. at the local salvage. And super cheap. Easy peasy.

 

I'd use a four blade fan.