Maybe you can fit a thin air tank in the rear footwell, mounted on the back edges of the seat brackets (something like the TJM 5 litre.) Depends how often the rear seats are occupied, I have a Maglite 6D mounted there which is a bit longer but is not intrusive.
I was starting to wonder about that. Are there pre-existing holes you can re-purpose ?
I have not investigated in detail an under body mounting location for an air tank. But a small one gallon model like that sold by ARB should be quite easy to find a location for. I have done this on my other vehicle which is a Jeep. I like having a tank if only because it acts as a buffer in the system, reducing the amount of on-off cycling by the compressor. When I get around to installing a compressor in the Grenadier the first place I will investigate for the air tank is the location used for the urea tank in the diesel models.
How far from the pumps can the tank be? I assume a few feet doesn’t matter?
The distance between the compressor and the tank is not an issue. In the setup on my Jeep the compressor is under the hood (an engine driven AC style compressor) and the air tank is mounted above the rear axle on the underside of the body. The air line connecting them is approximately 8 feet.
