Six NASCAR drivers are expected to share rides for three teams in the upcoming Rolex 24 at Daytona International Speedway. The latest confirmation is Marcos Ambrose to co-drive the No. 60 Ford-Riley for Michael Shank Racing in the twice-around-the-clock race on Jan. 26-27. The Australian, who drives the No. 9 Ford for Richard Petty Motorsports in Sprint Cup, will team with fellow Cup driver A.J. Allmendinger (on last year's winning team), plus Justin Wilson, John Pew, and Ozz Negri.