Cant cool my 5.9 magnum. Radiator size or add one thing else?

Yes one of my cars is supercharge with a vortech blower but not turbo. If i disconnect the supercharger it still runs hot. I will take it for a few more test runs over the next few days and hopefully the steadier temps continue with middle out of the thermostat.
If i want to run that fan i will need to change my water pump as for some reason my water pump doesn't have the thread on the front to screw the fan onto.