Sounds like the previous owner never met a hack job he didn't like. That sounds like quite the restoration project. One thing to keep in mind when you go to reconstruct the AC system. In addition to the compressor and any hoses that were cut you will also need to replace the receiver dryer because if the system has been open for awhile the desiccant inside is almost certainly saturated with moisture.
Just my 2 cents worth. Good luck with the reconstruction of the crime scene.
I dunno but im 90% I tossed it I'll check when I get home but its not in the back of the car where it was before but I did find a Cone filter in the back (I went back to the stock air box with a K&N filter)