Here's an update from COPO test session from Bradenton with the 5.3L SC motor.

After nine runs, the best pass was 9.69 at 140 mph with a mild 1.40 sixty-foot time.

http://www.youtube.com/watch?feature=player_embedded&v=Lm0356tFRMI

Here the GM guys are swapping motors and dropping in the NA 427/7.0L LS7 piece for tomorrows test session