I have a 66 Chrysler 300 2dr with 383 4bbl auto trans. I had a shop check out the radiator and the tank and core are bad. Part number on radiator is 2582960. Can't find this number in my part books they show a 2582959 and 2582961. The radiator I have is a 22 inch 2 core. Can anyone tell me anything about this radiator.