FULL MUSTANG GT500 COVERAGE @ INSIDELINE.COM: www.edmunds.com It’s something like trying to drive the 2010 Ford Shelby GT500 on a roller-coaster, only there are no steel tracks to keep you from slithering off the pavement and ending up in a flaming heap of 540-horsepower Mustang. You can’t even see where you’re going, really. Hard on [...]