Logic and radiators
Let's think logically about radiators and cooling. First, a four-row radiator is 33% more rows than a three-row, not 25%. Second, all things being correct, the thermostat will control the temp. If you are flowing enough water in the radiator and enough air through the radiator, a properly sized three-row will cool the same as a four-row because the thermostat will regulate the temp. Cooling problems occur when you ask a radiator to do more than it was designed to do -- like putting a big block in a Vega. The Vega radiator was designed to cool a 4 cly. Or, if you expect an old clogged radiator to cool. It just won't flow enough water.