........................... I'm just gonna get one of these. Neither of my cars ('70 Duster or 1993 Jeep Cherokee) have A/C so having one portable unit to place in either one is more economical than converting either to true A/C.
https://www.youtube.com/watch?v=GpxyKnLTGGI
Best part is you can turn it on or leave it running while the car is off it draws very little power.