well this guy said one was in his jeep grand cherokee
check this layout out...
http://www.offroaders.com/info/tech-corner/project-cj7/project-cj7-onboard-air-York-install.htm
1York AC Compressor (factory installed on an AMC 360 out of a Jeep Grand Cherokee)
2Tube-O fitting to 1/2" NPT (Kilby's Rotolock fittings, )
31/2" NPT female to female (kilby or a hardware store)
4Air Intake Filter (Kilby Air Intake Filter, FS-07-050)
5Square D pressure switch (set to 120 psi off) (Kilby, 49J59)
6Air Manifold (hardware store)
7Adjustable Relief Valve (set to blow at about 130 psi) (kilby, NC25)
8Pressure Gauges (on at manifold, one on dash) (hardware store)
9Oil / moisture trap (Coalescing Filter)
10 Check Valve (Kilby, CB38)
11 1/4" T, 3 female ports (hardware store)
12 1/4" Couplers, male port (hardware store)
13 Barbed 1/4" to 1/4" male port (hardware store)
14 1/2" NPT male to 1/4" barbed hose fitting (hardware store)
15 1/4" male to 3/8" (the Oil / moisture trap is actually a 3/8" so the fitting on both sides of the moisture trap is a 1/4" male to 3/8" male. (hardware store)
16 1/4" Elbow, male one side, female other side. (hardware store)
17 Male to Male connector (hardware store)
18 1/4" Elbow, male one side, female other side. (hardware store)
191/4" NPT to 3/8" Nylon Quick Connect (Grainger) NOTE: The air horn and pressure gauges use different sizes, pressure gauges use 1/8" Nylon Quick Connect and Air horn fitting use 3/8" Nylon Quick Connect.
20 1/4" male NPT to 1/8" female NPT (hardware store)
21 3/8" Nylon Quick Connect to 1/8" male NPT (air horn adaptor) (hardware store)
22 Yard Sale acquisition - Really loud air horn off a '76 Mack
23 1/8" nylon air hose (hardware store)
24 Stock 1/4" air line with male factory fittings (hardware store)
25 Air Tanks,
Custom Front and Rear Bumper Project26 1/4" NPT male to male (hardware store)
27Air Blow Gun — 1/4" female Inlet, 1/4" threaded outlet.
283/8" nylon air hose for air horn (needed volume) (hardware store)
also - awesome info...
http://www.offroaders.com/info/tech-corner/project-cj7/project-cj7-onboard-air-York-ID.htm