Some time ago, someone brought up the subject of the Western Sport Special edition of the Challenger, which I'd never heard of before. Unfortunately, I couldn't find the original thread, but here's a link to a European guy's Challenger site that has a section on the topic and a link to someone else's site that features a restored Western Sport Special Challenger:
http://www.dodgechallenger.co.uk/
Once you get to the frames page by clicking on the picture of the Challenger on the home page, click on the 1970 section. Scroll to the very bottom of that page and you'll see the link to the Western Sport Special page.