There's some good tech on the interweb. If you're using the Jeep unit, it's likely a Sanden and will need oiling. The 'cool kids' use a York (I'll be a cool kid one of these days) as they don't have the oiling needs and put out more CFM (enough for air tools
). I do know of at least one working Sanden and I don't think he built an oiling unit into his. I don't know if it still works or not and I don't know if it'll run air tools or not.
Kilby seems to be the master of this (
www.kilby.com) and you could make an argument that is the way to go. You'll get reliable parts in kit form and you can bolt it in and go.
There's a LOT of tech on OBA on
www.pirate4x4.com if you can find the posts from 2001-2003, you'll get some good tech instead all the cool kids telling you to search.
Basicly, you'll need some heat resistant hoses/fittings near the compressor, a pressure switch to switch the compressor off when you reach your regulated pressure, a gauge is kinda nice, some kind of tank (lots of creativite solutions out there) and your fittings.