you probably can if you get a tune for the shelby to put on it...you will have to unmarry the 2011 5.0 and marry the tuner to the gt500...i belive it is the same tuner just diffrent tunes...i think you can umerry one like 5 times total
Yes, and for reference the SCT tuner I'm using now I got in 2007 for my 2003 Mustang. It can be used for up to 5 vehicles but it can only be married to one at a time.