You may also give this a shot:
http://www.cobrasnvettes.com/index.html Jeff may be able to build you a nice Chevy-based Cobra.
*You'll never find this information on any Ford-oriented web site or publication, but Shelby actually intended the Cobra to have the 'Heartbeat of America' (Chevy Vette engine) but Chevrolet turned his offer down. Been kicking themselves since then! As for me, I'm afraid I've got terminal snake fever--the kind that takes all the Chevy out of a guy. Gotta be a Ford power train for me. It's just not a snake without the right sound.