T100 On-Board-Air
Here's the only T100 with OBA that I know of so far:
http://www.4x4wire.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=78;t=000177
http://www.4x4wire.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=78;t=000246
He used a York compressor as well.
I've got the same pulley modified the same way and mounted. I didn't like his soft (rubber) mounting method and belt adjustment, so I'm doing it a little differently (hard mounted with and adjustable idler pulley).
I got the compressor mounted, I just need a special bolt I had to order for the timing cover so that I can leave it in the truck. And the right sized belt, obviously...
The idler pulley and adjuster bolt are from the power steering idler on a 22R engine.
The compressor is mount is VERY solid, even with the one bolt not screwed in, so I think it will work without vibration like the new one in my 4runner.
Update- Its in and working. No problems so far. No plumbing yet though. Two new pics below.

Before:

After:
