[plain 69]

Those box fans will help keep her cool but misting that radiator will do a better job. I usually mist the radiator and keep the temp down around 170-190 or so.

Your smoke could have been oil/water in the headers, mufflers and/or pipes. If your motor is making more horsepower than before it will make more heat and will overheat if you had a marginal cooling system before.