Just joined the site, dont have a Shelby but I have a 2003 Zinc Yellow Mach 1. I have just about every bolt on and installing my JBA shorty headers and PHP intake spacer next week. I am putting down 301HP at the wheels and 325lbs of torgue at the wheels. My best time to date at the track is 13.01 @ 107mph. Launching the car with 4:10 is a bit tricky. Once I get my headers and intake on I should be into the 12's pretty solid, no guess though only real numbers. I am looking at buying a 2007 GT500 to sit next to my Mach 1 in the garage and wanted to find out everything before buying.