I recently recored a $30 ebay radiator that turned out to be a sprinkler. It was $200 and then I still had to solder some junk myself after bringing it back to the radiator guys twice. I think all fj55's were 3 core. I never had overheating problems, so I kept it 3 core. On a 115F day, the temp needle will stay right in the middle of the gauge. A friend nearby has a an old trail duster he is building up. Needless to say, those measurements did not match. But dodge did use different engines and 2, 3, and 4 core radiators depending on application. Maybe some really do fit, but not the one I measured. Due to the way the 55 radiator bolts up, there are probably a lot of custom options out there.