There was a company a couple years ago working on a retrofit heat pump system for old classics. Was basically a valve/switching system that you installed in the ac lines. All it does is turn the evap into a cond and the cond into an evapI do not have a heater in my 57 chevy.
I did in August but pulled it to make room for the AC system.
I drove my old Nova for many years without a heater.
But it had a cowl hood scoop that would de ice the windshield.
I will stick a heater core under the dash I bet before winter is over.
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