I used to install under-dash units back in the early 1960's when my father's shop had a distributorship for Mark IV and later, Climatic Air add-on units. One of our customers claimed his under-dash unit would chill beer to the point it had ice crystals in it, while driving across the Arizona desert. However, he made his living as a salesman- - - -draw your own conclusions!

An under-dash unit should cool down a pickup cab to the point of being uncomfortable if it's installed and charged properly.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!