I agree. Fear of litigation. Howard Hughes' boys tried that using the skin of the car as a heat exchanger for a steam car. An errant Model A Ford showed them it was a bad idea.
Jet aircraft use hot bleed air to de-ice wings and provide air conditioning for the cabin. The tubing is welded to the leading edge sheet metal.
All the same, for very light-duty vehicles, a rear-mounted radiator is an idea with some merit.
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2000 Ford F-350 SC 4x2 6 Speed Manual
4" Slam
3.08:1 gears and Gear Vendor Overdrive
Rubber Conveyor Belt Air Dam
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