Bill Calwonsen hauls grain, fertilizer, sand, rock and more with a hopper with his 2007 Peterbilt 379. The truck features a Cummins ISX with 725 horsepower, an Eaton 18-speed with 3:55 rears and a 312-inch wheelbase. The truck was custom when Calwonsen bought it, but he restored the passenger side from when it was laid over. Calwonsen runs regional out of Oklahoma.
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