The benfit of the york over the sanden is that the york has a oil bath to lubricate the piston that is seperate from the coolant. the sanden relys on the coolant as a lubricant. In the absence of the coolant, the sanden will eventually sieze.
the yorks came as 208, 209, and 210, the number refering to the CC bore of the compressor. I got my York from a 80's volvo 240 from a junk yard, cost me only a couple bucks. AMC v8 motors came with yorks so the bracketry is out there for them. I paid about another $30 to rebuild the york with new rings, seals, and barbed intake/output fittings. My OBA tank is a 5 pr 7 gallon airbrake tank from a mitsubishi fuso box truck that I pulled out of the junk yard for cheap. I am using a craftsman pressure switch I pulled off an old compressor, turns ona at 50 psi and off at 125 psi. everything else to plumb the system is plumbing supply shop stuff that was dirt cheap. I have about $100 total into an OBA system that I've been using for 10 years.
Now that I posted that.. My Daily driver pickup uses a Viair continuous duty air pump and it works just as good if not better. It's mounted up under the frame rails and other than the occasional vibrations from turning on, never know it's there.