Battling overheating new 360 build

Being I only drive during warm weather, I took my thermostat and gutted it of spring and plug and pin guide, basically making it a high volume water restrictor. I have an autozone 5 vane pump, but am running a seventeen inch 5 blade clutch fan and a modified big block truck a/c homemade hack double belt 28 percent overdrive pump/fan pulley