That's literally what my restoration project is becoming.
It's a Chevy which I am turning into a GMC with a mixture of parts ranging from 1973 to 2010, and has parts from Ford, Dodge, Jeep, even a VW cigarette lighter...
Cars that new have aluminum radiators with plastic end caps. And it's cold out, making plastic brittle. I guess the radiators in TownCars (same as Crown Vic, same as Grand Marq, same as cop cars) were just made right