Had a ideer for a A/C system

I say for on the cheap, tint the windows, put some insulation on the firewall and get a fan like the school bus drivers have. you could also try and figure a way to get some air to your back and *** as these are generaly the hottest places because you are sitting on them, one of those 70's bead seat covers might work. Other than that cobble together some ac parts.