The best stories about NASCAR cheating

http://www.popularmechanics.com/cars/news/vintage-speed/top-nascar-engineering-cheats
read all three pages, it's worth hitting the "Skip the ad" button.

Found on http://www.dogfightmag.com/blog

If you like this kind of thing, read more about Smokey's tricks http://justacarguy.blogspot.com/2006/12/new-smokey-story.html

For a visual on how flagrant the cheating was, look at the side by side comparison of Jr Johnson's Galaxie http://justacarguy.blogspot.com/2010/01/how-junior-johnson-made-1966-ford.html

or Richard Petty's 1968 Roadrunner http://justacarguy.blogspot.com/2010/01/natl-assoc-of-what-cars-heres-another.html