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Machnach has found the 5.0L V-8 to be adequate for most wheeling situations, though he did add JBA headers and a 2-inch-diameter dual exhaust to help it exhale better. The engine is kept cool by a Griffin aluminum twin-row radiator and Flex-A-Lite dual electric fans. Other underhood mods include underdrive pulleys, an Optima YellowTop battery, Bosch spark plugs, and MSD plug wires. In an effort to ensure that the engine can get air if the mud and water gets too deep, Machnach fabbed up a snorkel using 2-inch-diameter tubing and it draws air into the airbox from near the roof of the truck.