Caterina - a Motor Cities NECO member has just put air struts on his Cougar successfully.
If you are interested, you two should hook up. As from what I can tell, mounting the air struts was a simple swap of the current spring/strut setup, and the hardest part was actually making the compressor tank look pretty in his trunk.
Find him on the NECO forums... his user name is Caterina
Here's a link that he posted on NECO for you to check out