Total side track: What kind of compressor are you planning? Small tank somewhere under the truck?
I've had a York AC pump in use as an air compressor for years on my off-road truck. With a 3 gallons tank and a couple quick connect fittings it was great! But adapting one to my modern vehicles just isn't an option. I've looked at the the Viair Pumps but they are big $'s for my crappy budget.
I'll start a new compressor thread when I get done installing the compressor.
I'm installing a 4 gallon tank. The compressor is this one:
http://www.extremeoutback.com/product/14/ExtremeAire+Magnum.html
ExtremeAire Magnum
Imagine an ExtremeAire Compressor with TWICE the power and speed, all in a package only 2" longer than the original! Now you can have a continuous 12 volt compressor that will put out 6 CFM free flow and a whopping 2.6 CFM at 100 psi. Nothing in its size, class or price range even comes close! The ExtremeAire Magnum utilizes a 1.5 HP fan cooled motor and longer piston stroke to make the impossible possible. The Magnum has all the key features of the original ExtremeAire such as superior filtering, stainless steel hardware, heat dissipation cylinder coating and powder coated filter housing and fan shroud. Plus it can be mounted in any angle or position, even upside down! Sealed bearings mean no servicing or lubrication is necessary. Uses include filling tires, running air tools, air bags, lockers, train horns, etc. It is the perfect unit for jobsite chores or ranch duties. Since the unit is totally sealed from the elements, you can mount it under your truck on the frame rail so valuable storage space is preserved.
Specs:
-1.5 HP Motor
-95 amps @ 12.5 Volts DC
-Continuous Duty @ 150 psi
-6 CFM @ 0 psi
-2.6 CFM @ 100 psi
-Weight: 20 lbs.
-Dimensions: 16" long x 6" wide x 9.5" tall
Here's a sneek peek: