A little more history...
At some point my dad added a Vap-r-kool setup, which was a water tank and pump in the back and a sprayer in front of the radiator. Worked wonders while towing a largish boat from Bakersfield to Tahoe in August.
Years later (10 years ago?!) the pump is rusted up, the tank is cracked, the old radiator isn't radiating like it used to, and I need to get up out of the valley and home to Reno in the middle of summer.
This has got to be one of my most inspired redneck improvisations:
Temp gets a little high, stomp the water bottle, instant temperature drop. Yes, it worked.
When I started the teardown, I discovered I'd left the bottle under the seat all this time. Had to preserve the memory before ripping it out.