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A propane-injected Cummins 4BT 3.9L turbodiesel, most commonly found in commercial vehicles like step vans, is anchored under the hood. Wood installed this engine more than 11 years ago, before the swap became popular. This direct-injection engine produces 105 hp and 325 lb-ft of torque according to Wood. Also under the hood is a 210-amp alternator and a pair of Carquest NGT Extreme batteries. Engine power is channeled through a TH400 automatic transmission to a Jed's Machining-doubled NP203/205 combo.