[Flathead Fever]

Check the number of tubes and the size of the tubes and compare them to the original. I had one new radiator at work where they used so much solder it plugged the tops of the tubes. How could they not have seen that? If it was still in the car, you could have taken infrared thermometer and seen if some tubes are not getting hot, meaning they are plugged.

I had aftermarket Modal A radiator break the mounting bracket off of the radiator on the first road trip. It was half the thickness of the original. After that, no more repro radiators for me only, re-cored originals.