Mickey Thompson Tuff Truck Series In part four of our 2003 TJ build, our scrap yard Jeep gets treated to a 5.7 liter 50 state legal Hemi engine swap! All the questions about this popular build will be answered including wiring, exhaust, emissions,... (more) and exactly how to get this dual purpose Jeep tagged and licensed for the street, including California! Plus, we'll head to the Indianapolis 4 Wheel Jamboree and the Mickey Thompson Tuff Truck series and follow one bare bones competitor - Sonny Dohrmund - vying for the championship, without big money sponsorship.