I am looking for an air tank to mount in the stock evap location (I moved the evap can with the woods kit). I tried the warn tank that goes along with my powerplant winch but it hangs down lower then I would like.
I would like a rectangular shaped air tank that is wider and not as tall as the standard round tanks. Any thoughts??

 

river raider was making an air tank with skidplate that went in that location, not sure if they still do or not

 

As far as an actualy rectangular shaped tank, you're not likely to find one. Most tanks are cylindrical to keep the cost of manufacture down. Not to say that you couldn't build a rectangular pressure vessel (because that's what a tank is), but it'd be far heavier and more expensive than a cylindrical one.

The River Raider setup is pretty skookum!

 

Yeah...I wouldn't be against building one myself, but since I am a beginner welder I don't think it would hold air

 

A steel tank of that size holding 100 psi is not a "Potential explosive" that I would be too worried about.

When you start talking about 2216 or 4500 psi in a tank of that physical size, then we're talking about something that you need to be concerned about.

Realistically, the floor pan of your jeep will protect you from any energy release or associated object being thrown around by the pressures and volumes associated with a Jeep's on board air system.

To Jeepsandrums:
The reason that they're all cylindrical is a cylindrical tank's geometry doesn't include "natural" weak spots like a rectangular one.