Air tank behind front bumper?

[71swb4x4]

Has anyone put an air tank behind their front bumper?
I was under the Jimmy trying to figure out how to run the lines. My plan is to run a five gallon tank under the tub behind the passenger rear tire. I would run all four bags off this tank.
After looking today I have enough room to put a three gallon tank behind the front bumper (between the frame rails), and the four front valves there. Since I will be running an engine driven compressor it won't take extra line.
Anyone seen this done? Are there reasons that I shouldn't run this up there?
If this works I plan to do a three gallon up front and a three gallon in the back.