Maybe Not. I had the exact same issue with my 477 Hemi I had a new large Be Cool radiator, very high-flowing shrouded electric fans and still ran hot at idle only. I changed my pump to a High -flow Flowcooler Pump and Robertshaw High-flow Thermostat because I suspected the problem was low coolant flow at idle. The overheating issues were gone after that. I'd try those two first as they are way less expensive that new radiators and fans.