Ford F53 460 powered fan clutch options?

Is your electric fan coming on when temps begin to rise? When does your engine overheat? on long hills? at idle? over 90f days? Did you have this issue before you changed the WP? Also I would compare your gauge reading to readings taken with an IR gun at the thermostat housing and sensor in head that controls your temp gauge. At idle at operating temperature what is the temperature difference from the inlet to the outlet of your radiator? With a new radiator etc. I understand why you suspect the fan clutch but it sounds like you have only 30f to play with between clutches. It may be operating as it should. I would choose an OEM clutch over an after market one. 460's and 454's generate a lot of heat. My fan clutch used to come on at the slightest hill until I put headers on and I never hear it come on except and long hills.