somethings not right here

I run that Milodon Hi-flo, so I can reduce the fan rpm cuz I regularly hit 7200rpm, and I'm hoping the belt stands a better chance of staying on and the fan not blowing up. So far so good. I also run a 195 Milodon hi-flo stat, that maintains a minimum water temp of 205 at the stat. I depend on the 7-blade and thermostatic clutch to do their jobs. So far so good, 15 years and counting.
The only visible thing different about the Milodon pump is the anti-cavitation plate. IIRC it was an 8-vane.