If you have a hi flow pump you need a big radiator and the proper thermostat , If you need all that you must have a motor with a big cam and advanced timing too get the hp you need, I have a 302 with a bigger cam and if I set the timimg right I can run all day with a 180 degree thermostat and a 3 row radiator crawling with a fixed fan I am good all day in the heat when I run in the snow I can advance it a pinch and get more hp with the denser colder air and still stay cool for spinning the tires, take what you need this is what I do