Not only is the body of this truck big and mean, so is its power plant. Stuffed under a maze of chromoly tubing is a Chevy big block 572ci crate motor putting out over 620 rear wheel horsepower and 650ft lb of torque. If we tore the engine down we would find aluminum rectangular port heads, a forged 4340 steel crank, a hydraulic roller cam, forged 4340 H-beam rods and forged pistons using floating wrist pins. RPM Exhaust custom-made 2.5-inch stainless steel headers to keep air flow moving efficiently. A pair of Magnaflow 3.5-inch mufflers are centered under the truck giving it that increased grumble that only a big block can achieve.