I went with a 3/4-ton radiator from US Radiator for my 1/2-ton '62 Suburban. The 3/4 ton rad is a little taller, and a little wider, so it gives more cooling. Since I drive the beejeezus out of my truck, and HATE heating problems with a white-hot passion, the bigger radiator was worth it. It bolts right into the same spot as the smaller 1/2-ton radiator. Don't remember the price, but it wasn't bad.
The one down side is that the stock 1/2-ton fan shrouds don't work with the wider radiator.
With a lot of research, I found that the bigger radiator was also used with automatic trans 1/2 tons, and that shroud works.
Still have to get mine on, but even without a shroud, the big radiator keeps my 350 engine cool in Atlanta's summers.
-Brad
