Converting and a/c compressor to on board air

It's capable of making over 400 psi, but it is designed to be a sealed system. The oil that lubricates it is in the freon. An air compressor compresses outside air and discharges it. I don't know how you would keep an ac compressor lubed. If you find an answer for that then good luck.
On a side note, some of the old eighteen wheelers used an ac compressor that actually had oil in the compressor and a dipstick to check it. They even had threaded fittings for the lines. Worst part there would be needing to run a v-belt.

Yeah done research on this . You have to put an inline oiler on the intake side and an oil and water separator on the output. Parts that can be bought at Harbor Freight. The hardest part will be finding a place to mount and adding a pulley to engine to run compressor.
There are several arrivals online. Just got to cool off some for me to dive into it..

I will when I get started in it. And will tell how I do it. From what I have read it will be 100% duty and will run any air tool better than a small home compressor .

The old style Ford York compressors were self contained with oil in the crankcase just like and engine. Most used a four bolt pattern for a mount. V-belt driven and easily plumbed. There is a write up somewhere that tells the difference between the Yorks as far as volume. Some have more Output that others. If I can find it ill post it.

edit:

The one you want is a York 210. It has the most displacement therefore more volume.  Look for the tag that says York not Motorcraft!   A 206 or a 209 will work, its just a 210 will be faster and have more pressure.  I'm sill looking for the article. 

Got a York compressor today. So one step closer.

I think unless u buy used its just as cheap to buy something like ARB and u can still use it even if something happens to the motor and yes something can happen to the battery but its easy enough to swap batteries but I would still like to see it when its done.