somebody please educate me on this

I think it is the other way around.....8 blade for AC...6 for non.....more blades for more cooling

Well that is what I would have thought but this is what someone posted on here 10 years ago.

The factory installed 6 blade water pumps on the AC cars with a pulley ratio that would spin the pump/fan faster to get more air flow through the radiator at low speeds. The non-AC cars got the 8 blade pumps and different pulley ratios that would spin the water pump and fan slower then the AC cars. I run the flow kooler water pump with the non-AC pulley set up.

So, I don't know and that is why I am asking because I only want to do this once.