I have made it a habit to put one of those K-mart style box shaped house fans in front of the radiator whenever I break in a new engine. Sometimes it looks a little hokey, with bungee cords or bailing wire holding the fan from falling over. So what. New engines will often run much warmer than a high mile mill. The tight clearances cause friction and that means HEAT. I'm starting to think that it makes sense to also equip new motors with previously used and proven coils, distributors and carburetors. With the high rate of camshaft failures, the engine REALLY needs to start up and stay running. A new carb may not be jetted correctly. The new coil (Unless tested) could be defective as well as the distributor. Who wants to pull the engine after a wiped out cam shoved debris all through it?