Thats not what Joe is saying. If the cooler(not talking about the end.caps) isnt rusted through(there's no way. I live in the saltbelt and mine was just rusty) you just disassemble it and put new orings on the cooler and press the caps on. Done. You can very easily clean it up and then hit it with paint to help.with corrosion. Id bet money if it was leaking that bad after 2 years wihin an oring replacement the orings werent quite right.
In your shoes, Id rebuild the ford part. You can get the orings from Clay,.iirc.
That said if you muuust replace it make sure the dorman part has a forever warranty or skip it.