I found it interesting that the guy with the 71 'vert/455 went from factory setup (7 blade factory fan and Hayden clutch) to a Flex A Lite fan and it got cooler. I have a GTO with stock setup, air, 455 and it stays cool under all conditions here in Florida. 4 core brass radiator, very old but I had it cleaned. I have a '87 Cutlass with a 500 Cadillac swap and an aluminum radiator. I wanted to use the Lincoln fan but it doesn't fit; it hits the water pump. I used a homemade sheetmetal shroud and a 6 blade SS Flex A Lite fan and it was OK on the highway but not in traffic. It was fixed, no clutch. I switched to a 7 blade GM fan with a new Hayden clutch and according to the temp gauge it ran cooler.
|