While at Colorado Auto & Parts, Mike Finnegan gets the inside scoop on something he’s never seen before. That’s only because it’s a one-of-a-kind machine. It’s a 1939 Plymouth pickup truck, but instead of a normal engine, it has been equipped with a massive 757ci radial airplane engine. How did this truck get built? How did it even get conceived? And of course, how fast can it go? All that and more will be answered on this episode of Roadkill Extra!