That’s pretty good. I did something similar but a lot more recent.Back in the early 90's, I had a bone-stock 1979 Chevy "Custom Deluxe" pickup. 2WD, 250 I-6, 3 on the tree, 6-foot bed. Didn't even have a stock radio. When it got hot in the summer, I'd fill milk jugs with water, freeze them solid, place them on the floor on the passenger side, open the side floor vent on the passenger side and crack the window on the driver's side. As long as I was moving, I had "hillbilly air-conditioning".
Right before I got this challenger I was forced to drive an absolute turd Honda with no air conditioning, and during some of the hotter days here in Texas I resorted to getting some of those little freezer packs made of gel, freezing them and sticking them under A 12V oscillating fan and sitting in the passenger seat blowing towards me.
No, it didn’t help much either