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Vintage Mustang Tech Advice for an Overheated 1965 Mustang Convertible

1965 Mustang Engine Bay

Running Hot

I have a 1965 convertible with a 1974 302 engine that’s been rebuilt with C4 auto transmission behind it. It used to run at three-quarters of the way to hot on my temp gauge. I recently installed a new under-dash air conditioner. I have a Blue Code six-blade fan with a 3 1/2-inch-deep shroud. The radiator is a three-row made for the 302 engine. I have flushed it and have no blockages with a new thermostat opening at 170 degrees. Now, if I drive it 5 or 6 miles on a hot, 90-degree day, the gauge moves almost to the hot mark. The fan blades are about 1 inch from the backside of radiator. I considered adding an electric fan, but I don’t have room. What do you think could be causing the overheating?




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