I take it you're looking to keep your car totally original and is not a driver? That's ok. But if it is a driver, you can do what I did. I took my original radiator to the radiator shop and had it re-cored using the original tanks. . I also went from a 3 row to 4 row. What a difference! The car runs stone cold..
Biggest problem now days is finding a reputable radiator repair shop