Under the hood is a Generation 6 GM 502ci crate engine. GM says this powerplant generates 450 hp and 550 lb-ft of torque. Air and fuel are mixed via a 770-cfm Holley Truck Avenger carburetor and exhaust gas is passed through Hooker headers and a 3-inch-diameter dual exhaust with Quickflow mufflers. Fuel for the thirsty engine is stored in a custom 28-gallon fuel cell. Power is routed through a custom-built Turbo 400 transmission that rests on custom mounts. The trans is shifted by a B&M shifter and cooled by a B&M cooler. The GMC G506 two-speed transfer case is a divorced unit and is controlled via custom shifters. All three of the Driveshafts Unlimited custom driveshafts have 1410 U-joints.