I have a 78 fury 2 door hardtop.
A few years ago I had trouble with it running hot. 2 years in a row I pulled it at the beginning of cruisin season and sent it to a radiator shop to be rodded/boiled out. Did no good. This is a 2 owner car I'm the 2nd owner. I got it with 38k original miles in 07, it now has 56k on it. I went to several parts stores to see what they had to offer for a replacement radiator. I couldn't believe it that even on a 70s American car all any could offer me is something that would fit the hole but looked like it would be more at home in a freaking Toyota. No way in HE11 I was putting a Toyota-ish looking radiator in my car. No way no how. So I wound up buying a Champion all aluminum one for about the same money and that was with delivery to my door. All aluminum (I'd rather have copper/brass but at least this one has no plastic) and American made with life time warranty. And a whole lot better looking than a Toyota radiator. And boy did it ever help with temps..... This car has AC and the factory fan on it is a 4 blade solid mount no fan clutch.
My son had a 90 w250 with a 360 gas engine. He too needed a radiator while he had that truck. Stuck one of those Toyota looking POS' in it, didn't cool we'll at all and didn't last long either.
He wound up finding a HD 3 row original copper/brass one in a very similar truck in the boneyard. He put that in and no more problems.