The previous owner said one of the first upgrades I should do is an electric fan - there seems to be a ton of different size options so what is considered "optimal" (10", 14", 16", etc.)? Are dual fans a big advantage or will a single be sufficient?

I've read a few threads suggesting a more powerful alternator is needed for electric fans so I'm researching that also...

 

Here's whats in there now, not sure if it's stock...