This 1967 Shelby Cobra is an all-original car, but if it looks a little less aggressive than the side-piped, roll-barred, hood-scooped 427 Cobras you are used to seeing, it's because this is a Street Car version.    These were a little less racy than the 427 Competition or Semi Competition cars, but still a legendary performer on the street or track.    Sometimes called the "Gentleman's Cobra", the street cars often were powered by the Ford 428 big block V8 over the high-strung 427 side-oiler.   Watch the episode to learn the story on this highly-original Shelby!