Replacement Radiator Help and Alum vs OEM style

I have a 500 440 source stroker kit 10:8 to 1. I live in New England so I don't usually see the temps. you have out there. I know the Champs aren't show pieces but very affordable. I thought with the bigger size (C-body) radiator you might be safe. Just throwing it out there. I have the narrow stock size Radiator in mine.