Antique ex-freon now used as air compressor seen this type?

Hi, I enjoy lurking here and liked flying because of my ex-stepfather
flew private planes and built Osprey II later crashed it of pilot's
error (has three tanks, one was selected on empty.), survived with
minor injuries.

Anyway back to the attention on this odd compressor.

I have photo of thing:

http://www3.sympatico.ca/jpero/compr...compressor.jpg

And poorer photo:

http://www3.sympatico.ca/jpero/compressor/overall.jpg

Air compressor was cobbled together decades ago using old freon
compressor. Rather poorly I add.

Now I'm rebuilding this compressor because of head gasket blew and a
"hsss" leak from short pipe nipple, so it has to be shut down. This
thing has gasket made of lead foil. (!!) That thing made big racket
*CLACK CLACK CLACK*! while pumping and repeatedly cycles every hour
because of this leak. So the noise is driving me up the wall. :-) It
was the small end rod clattering on the wrist rods. But by jove that
thing pumps up to 120PSI cut off if you wait long time, all the awhile
pumping on 1 cylinder and both pistons doesn't have ring by design.
Regulator is set for 50PSI. Air is used to blow off built up dust on
customers' units under repair, TV, audio, TV projector etc.

Have questions on that "unique" compressor if you are willing. I have
many more photos of this in disassembly stages.

I have tried two other newsgroups for HVAC and other one
rec.crafts.metalworking with little success.

Thanks & cheers,

Jason (Wizard)