My Milodon Hi Flow was new in year 2000, and it's still on the car.
I bought the hi-flo cuz ;
Cuz I have always run Mopars, and they all tended to throw belts off somewhere over 5500.
Will, I wasn't planning to go 7200, it just happened one day, and when I heard the sound coming out of dual 3" pipes, I was hooked. So, I went looking for some underdrive pulleys.
I reasoned that with underdrive, I might need a higher-flow pump.
To round things up;
I installed a 7-blade, high-attack angle, all-steel Mopar-fan, on a Ford thermostatic clutch.
Between that and a hi-flo 195 thermostat, my system, after reaching operating temp never exceeds 207*F, no matter how much I abuse the engine.
And she has never thrown the belt.