Truck Mounted Air Compressor

I am setting up a field service truck to handle service calls and warranty jobs out in the field. I am going to purchase a used pick up truck and outfit it with tool boxes. I am going to have run air tools from the truck. Mainly I will be using 1/2" impact wrenchs, air ratchets and air hammers. What kind of truck mounted air compressor would you recommend I install? I plan on using it for a while and quality is very important.

For a truck mounted air compressor, you need one powered by a gas engine and a horizontal tank. An Ingersoll Rand Type 30 is an excellent choice and is used by professional mechanics around the world. It has a 3o gallon tank and puts out 175 psi of max pressure. That should be enough to run you air tools in demanding applications. The unit also has a powdered coat weather resistant paint so it will look good for years.