air compressor conversion

Every time I painted a car even with a 60 gallon tank I would end up going through a motor. I finally purchased an old 500 gallon propane tank that a farmer had used to water his cattle. I put the Harbor Freight larger V-twin compressor on it with their 6.5 HP gas engine, a heavy duty centrifugal clutch and a 175 psi throttle whip and a couple of 200 psi pop off valves on it. It takes about 30 minutes to get up to 80 psi but I have air all week for minor stuff. It's not quite as convenient as an electric unit but a lot better than burning through a motor when porting or painting.