Re: 50 years ago I was given this USAF 54 3100
Already have the biggest most powerful fan i could get at the time
Spal 30102113 Puller Fan (16In High Performance Race ; Curved Blade; For Use W/ 40Amp Fuse at 13V),
The kicker is they say not to use it as a full time fan. Not sure why that's the case. Its wired direct and will cool the stopped hot engine fast. Keeps running on the 195F thermostat driving. Only other options include adding a shroud as fan only covers a little more than half radiator surface. Big fan is noisy too. Will add a "fan on" light soon.
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