I ran a 2 gallon air tank on my last Jeep with the ViAir 450c compressor. The tank was mounted between the engine and radiator.It was great and allowed me to run air tools.
I can run air tools with my Powerplant compressor but it doesn't have the capacity the air tank had on my last setup. I would've run one on this Jeep but, with the exception of mounting one INSIDE the Jeep, there aren't many places for tanks in the 12+ Jeeps.