Ok guys !!
Look at these stats on 0-60 times for the mustang your all cooked up about and its HP rating. First of all you can see on teh chart the 2011 gt500 shelby does the same numbers as the 1996 GTS does. Hp rating for that car is 550HP and 510Trq. 96 GTS is 450HP and 490 Trq. Yet the same quarter and 0-60 times. Now take the Gen III cars with 505 Hp and less Hp again that that Mustang, and you get numbers beating that 550 Hp car. Numbers mean nothing. It is what is put to the ground. The 2010 ACR with 38 less Hp and 40 less trq than the ZR1 put out better numbers and Nurburing numbers they still cant beat.
With the new SRT GTS, the new mUstang with its 650 Hp will be eaten alive by this Viper if history tells the tale. If you do the equations , the Gen 4 cars and even the Gen 3 cars will keep up and maybe take the 2013 Shelby. The Nwe 2013 will destroy it in all aspects. Wait and see. Then all the mustang guys will ** hum. Where were they in Nurburing?...where are tehy in the 24 lemans...nowhere!!..They dont belong there. They can't compete there. Even with all that HP they supposidly produce.
Proof is in the pudding and, those guys never stood or stand a chance once again. The ZR-1 will also be looking at the LED taillights of the New SRT. They wre with 38 more Hp and will once again with less.
Here is the link to the 0-60 and quarter times of the mustang and which ever car you want to look up
http://www.zeroto60times.com/Ford-0-60-mph-Times.html