New water pump 6 impellers whats up with that!

Guess I'll chime in. Back in the day (early '70's), the hot tip of the day with the 273 engines that ran a little hot, was to use the A/C pump from a 318/340 because it only had six blades, and moved more water. Blade spacing or something like that, and this was in, I don't remember, Hot Rod, Car Craft, Popular Hot Rodding,........somewhere.

I did it on my iittle 273 .060 and damn, it worked. Dropped by 20 degrees or so.

Russ.