Ford 460 (F53) running hot

Just to add a little detail to the good suggestions you have already received and you know you have a good thermostat( check first in boiling water should open a 1/4 in or so), when you check the temp with your IR gun shoot the sensor in the head, on a 454 its in the LH head not sure where it is on the 460. Compare that to the gauge reading. My gauge was 15 degrees higher than the sensor. Also shoot the thermostat housing temp and compare. To check for a clogged radiator start where the water comes in from the thermostat housing and go across and down in a grid pattern if you see cold spots that indicates a clogged area. Pay particular attention to the center of the radiator where the fan clutch is. You will have to re-position the fan blades to get the readings. You should see a delta T of 50 degrees or so from top to bottom if the radiator is not clogged and is cooling correctly assuming it is a vertical cooling radiator. Once you check the simple things and report back there is a lot of info on this forum on how to cool these engines. Good luck.