awe crap.... thanks doods. I was being a dumbass and forgot about the pressure switch that I already have on the ARB. I have a small micro switch that turns on my compressor that is mounted into an existing hole on the drivers side, outer seat slider rail (stationary part). For some reason, I completely eliminated that pressure switch in my brain's schematic.
So yeah, dirtman. a simple air pressure regulator is the best approach for what I want to do and I think I saw some smaller sized regulators that might work inside the cab.
Yeah, two way air but I was just going to fab up my own manifold thingy using goodyear hoses, distribution blocks and a liquid filled gauge from amazon for about the same price. I thin I can source and use the same parts that the two way air kit uses for less money. Similar quick disconnects for the vinyl tubing are used with water methanol systems.
I'll take a closer look at two way air.