David Johnson's 2004 Peterbilt 379


David Johnson hauls milling machines in Alabama, Tennessee and Mississippi with this 2004 Peterbilt 379. The rig sports a 6NZ Cat marine block with an 18-speed. Johnson added a conversion kit and a drop axle and double-framed the truck. The truck works five to six days a week, Johnson says, and "the rest of the time we are washing it."

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