I need my truck to cool itself a bit better. Looking for cheap/easy tricks. 90 degrees outside with the heater on full power @ 5 mph brings the suck. I am not putting in a bigger rad or taking the hood off. Truck will get some good parts next year. So... Water cools better than anti-freeze, how little anti-freeze can I get away with? Truck won't see anything lower than 20 degrees. Truck has a 190 degree thermastat, but I don't think a lower one would help since it would be open in this situation either way??? Other ideas??? BTW, I am only having problems at altitude (8K+), so the truck is probably running on the rich side (stock 84 305). Last time it hit 220, I turned on the heat and it dropped to 210, I just want it @ 210 without having the heater on.