I did this in 2017 but used the biggest cooler that would fit in that space. According to my infrared thermometer, system temps are down in the neighborhood of 40*f on a summer day on or off road.finally got around to replace factory leaky paper clips and lines with a fin aftermarket cooler (thanks Joey for the idea) and -6an fittings and hoses (factory hp lines discontinued)..no more leaks.
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