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It's a fairly simple rebuild and you can refer to this picture for a good breakdown: Page 29: Fuel Supply System
You'll need a fuel line disconnect tool available at any autoparts store (5/16 and 3/8 combo) for about $6. The HFCM has 3 nuts on the outside of the frame that hold it on. You'll have some fuel loss that you can minimize by capping off the tank lines when you remove them.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.