Rebecca Starkey's 2011 5.0 Auto Times.
200 miles, Stock except for rear tires. 12.88 @ 111.8
200 miles, Stock except tires and tune. 12.55 @ 112.8 mph
Density Altitude was +1681' so theirs at least another 3/10 in the car in mine shaft air. Livernois car picked up 16 rwhp and 31 rwt in the first 2,000 miles (Sounds like Ford has a break-in mode hiding in the PCM) so who knows.
Poor little GT500 and Camaro.
http://www.youtube.com/watch?v=zZ2jBNDcqgI