[72Cheyenne454]

I wanted to add that there's more to a quality radiator than simply how many horizontal rows it has. Vertical tube spacing and cooling fins per inch play a huge role on the radiator's ability to transfer heat. I had a 4 row, brass/copper radiator I purchased new several years ago and it finally let go. So, I took it back to the retailer since it carried a lifetime warranty and exchanged it for a new one. Well, the new one, even though it was the same part number, is an aluminum/plastic 2 row unit. I cringed at first, at the thought of going to a 2 row from an old traditional 4 row. But after looking over the aluminum rad, I realized the amount of vertical tubes is greater compared to my old 4 row, as the tubes are much closer together. In addition to that, the amount of fins per inch is significantly higher compared to the old 4 row. Additional cooling rows (top to bottom) and more cooling fins per inch of tube will all aid in heat transfer. The two row aluminum was nearly as thick as the old 4 row as well. Only a few miles on it so far, but I don't see any problem with it cooling my BBC.

When searching for my replacement brass/copper unit years back, all the new "cheaper" chain store 4 rows available at the time had the lower tube count and the lower fin count per inch. It was only if I took my old rad to my local rad repair guy to have the core replaced with a high efficiency brass/copper unit that I felt I could get a quality rad. The price at the time was nearly four times the price of a new, lifetime warranty unit avail from a local chain store, so I went that way.

Also, take a look at US radiator's website. They provide detail on the differences between the various cores available and the cooling ability of each.

Miles