Here is the world’s fastest 6-speed Ford Mustang Shelby Gt500 owned and driven by Dr. Mark Duber a.k.a “Birddoc” – a monster American muscle car custom built by Chad Epperson. The engine of this beast is built by Tony Bischoff with a Kenne Bell supercharger and tuned by Jon Lund. The record was set during the 2013 NMRA Ford Nationals at Budd’s Creek, Maryland where “Birddoc” drove his Mustang Shelby GT500 with an 8.80 at 164 MPH. Check out the video. Watch, Enjoy & Share!