i looked at that as well, quickly dismissed it since the compressor i already had was no way no how gonna fit. but i agree with everyone elses statements. see pic of the install i just finished, 2 gal tank in front of the battery box, which may be over kill, but i had it and time will tell how much i use it.
i installed on this side so i would have room for a second house battery on the driver side if the need arises (my house battery is already on the driver side, but i could fit 2) and i made wiring a piece of cake