Hi I have a 1953 Chevy truck with the later 235 engine. I had to do the short shaft water pump and I have the four blade fan and I lowered the radiator as far as it will go . I have a 180 thermostat and a 7lb cap and a new radiator. My question is what can cause it to run hot while idling and when it moves it cools down . Is there any ideas on how to fix this or is there any better fans ? There’s not much room between radiator and water pump . Will a pusher fan work ?