Overheating during cam break in - help

I always place a big fan in front of the radiator to aid the cooling system while I'm doing the first start up and cam break in. Another thing, the easiest way to prevent a air lock in the cooling system is to drill a 1/8" hole in the outer part of the thermostat. I was taught this trick by an old timer over 40 years ago. Finally, I keep a water hose with a spray nozzle on it to mist the radiator if need be to get the cam break in completed.