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We’ve become accustomed to seeing supercharged 5.4s, but we’ve never seen something like this. While it doesn’t have a shifter coming out of the roof, the presence of a 6-71 roots blower atop the modern 5.4 really drives home the inspiration of Project Nightmare. The built 5.4 displaces 334 ci, and the blower is pullied for 14 pounds of boost. Running at the behest of a FAST XFI and burning pump gas, this combo puts down 771 hp and 730 lb-ft at the Flintstones on 18 psi. Dialing the boost down to a more manageable 10 psi results in 576 hp and 549 lb-ft.