Not of the GT350 but of the GT500. I'm hoping Ford posted this as a prelude to some GT350 video from last Summer's tuning session there. ;D
https://www.youtube.com/watch?v=RMEvHxS7on0&feature=em-uploademail
https://www.youtube.com/watch?v=RMEvHxS7on0&feature=em-uploademail