The radiator in the 63 300 had multiple leaks the driver's side bracket needed resoldered. So after reading some threads on here I decided to check out Cold Case Radiators. I communicated with Chris (member name Ccas) at Cold Case he told me to give them a call. I called and talked to Eric. He was very helpfull. I was looking at the MOP751A radiator. We compared diminsions and decided it might work in the Chrysler. I installed it today without too much hassle. I had to modify the brackets a little bit. They are about 1/2" too narrow on each side and hold the radiator up about 1/4" too high. I drilled a couple of holes and enlarged the bottom notches. I also had to cut out a large notch around the battery box. The bottom hose and transmission cooling lines fit without modification. I need a new upper radiator hose, but didn't get it yet. I have the heater core out and discovered the one I ordered doesn't fit, that story is in a differnt thread. Overall, I'm happy with the new radiator, and think it should serve me for many years. Here are a few pictures.