You would be far better off running boost to get there at least from a reliability and drivability point of view. 600hp under 6000 RPM with boost isn't hard at all. No need for a 260* cam, 225* is more like itwith boost. turbododge ran low low 11s with a very basic drivable combo.

11.67@118 1.88 60' with only 7-8 lbs of boost. Turbocharged, megasquirted, 407 BB, 440 source heads, roller cam, 9:1 comp. http://s292.photobucket.com/albums/mm14/beansgracie