OK, added AC baffles, new smaller fan/water pump pulley, new fan, high output water pump and thermostat. AT, vintage AC, 350/350 car still running hot in NC. Time for an aluminum radiator upgrade. Which one best? Is something like this from Classic Industries a significant enough upgrade? I assume 4 row is their best. A8600112 - 1967-69 GM F-BODY - ALUMINUM RADIATOR (4 ROW) - 17" X 23" X 2-34" CORE Or is a specialty radiator best, like Desert Cooler, etc. I have read in other forums (esp. for hot rods) that 1.25" tubing is the best. Any recommendations for a radiator to never run hot again??? Thanks!