I installed the Griffin Radiator Ford 27-1/2 x 19 2 1"tube Pro Series 126242.
This is a "generic" radiator that needed some fine tuning to fit.
You have to move the upper brackets:
Turn the rubber (inside the bracket) around by 180-degrees. Then slip this over the radiator core area. Fits nice.
Then you need a new lower hose, another generic
item I bought at Pep Boys:
The lower brackets can be spread out, just to support the radiator on the "thick" of the tank.
Top it off with a 180'F thermostat, bottle of WaterWetter, and I can run it without the shroud, and it stays cool!