Here are a few I found for sound. I think my next Cobra will be a twin turbo.
Original competition Shelby Cobra sound.
http://www.youtube.com/watch?v=RnSyHEx8EWw&feature=fvw
A quick FE Big Block, pretty sure I got that right on the engine type, nice car
http://www.youtube.com/watch?v=TI6lk...om=PL&index=45
A quick 427 Windsor small block
http://www.youtube.com/watch?v=XmDd14eITU0
A quick small block twin turbo
http://www.youtube.com/watch?v=VjhVb...eature=related