Cleet and Squirrel are trading the limo life for a high-octane food truck business, starting with a neglected Summit Racing box truck powered by a massive 632-cubic-inch big block. The revival takes a turn when they discover a bent valve and a seized lifter, forcing them to use unconventional 'one-hit' repair methods to save the $15,000 engine. Will this 'billion-dollar idea' actually survive its first full-throttle burnout, or is the engine destined for the scrap heap?