According to blueovalnews.com, JOB1 start build date for 2005 Mustang (at the new Auto Alliance plant in Flat Rock; no more Mustang production at the Dearborn Rouge plant) is September 7.
As always, "schedule subject to change".
The original schedule is dated January 20, though updated June 14:
http://www.blueovalnews.com/2004/plants/2005.job1.htm 
