I have a 65 fairlane with a 289 2bl, at. My problem is that the car keeps overheating. This is a project that I'm working on. Engine has been gone through, heads redone, new rod bearings, new oil pump, water pump, new aluminum 3 row radiator, electric fan. I've flushed the entire system about 5 times and it still overheats. Removed the thermostat the last time but still runs hot and blows out the pressure release. Any thoughts?