as many know, I'm doing an on-board air compressor system. I've had every other system there is and I really like the York system because, where the ARB/Viair systems are in the 2-4 cfm output range, a York system starts at 9 cfm and can get as large as 12 cfm.... for those counting, that's about the same as your 5' tank system in your shop... yeah, you could go to the wilderness and paint your vehicle (oh how I'm sure that would go over well).
so... these two links are about the best instructions on both finding and modifying the York system... so why reinvent the wheel when these guys did such a good job?
http://www.therangerstation.com/tech_library/york_compressor.shtml
to modify
http://www.rockcrawler.com/techreports/york_mod/index.asp