If you have yet to watch Ken Block tearing up the streets of LA in Gymnkhana 7, stop what you are doing and watch it here. You'll probably want a lie down after that, but then you should return to watch Chris Harris explain the nutty engineering that has gone into building the 845-hp Hoonicorn. Block and his team of Hoonigans claims this is a 1965 Mustang, but apart from the roof, A- and B-pillars, everything is bespoke.