[Ed Wright]

When I had my '56, I was an aircraft technician. I had our sheet metal shop make me a box, mounted next to the front of the radiator. Was about 6" x 12", (not round) with a -6 an fitting (with an -6 an cap)TIG welded on, drained water right through the factory radiator drain hole. Used aluminum tubing, transfers heat better, top flap/lid was on hinges, with aircraft latches to hold it shut. Testing with it bypassed, or full of ice, fuel lines sweating at the carbs, was a solid 8 hun quicker cold. At Fuel Check, near the scales, those old Carter WCFB float bowls would feel cold, and sweating.
People can repeat "only air temp matters", it's another thing Jere Stahl told me to do, and he was correct. I am not the only person having the same experience with that.
I know a fast Pro Stock car that cools fuel before pouring it in the car, and icing the fuel cell.
That was my experience. Right or wrong.