Sounds to me like there will be two seperate cars. One SVT, and one Shelby. I can only imagine the SVT will be lower power (400-450) at a slightly higher price than last years model, while the Shelby will have the 550 horsepower GT motor but will cost much more. $65,000?
FYI: This page has been updated. According to somebody on the SVT Performance forum Carrol Shelby was on a local radio program and claims the 2007 Cobra will have 500+hp, will be called the "Shelby Cobra" and will be debuted at the NY Auto show on the 25th of this month!!!!!