the motor you have is rated at 260hp, there is another 5.4 though, its DOHC and is used in the Navigator rated at 300hp, its also what the 00 Cobra R engine is based from,
i say find a cheap used standard cab 2wd F150 and put that in there with the lightning blower and go have some fun
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88 Notch, B&M Ripper, 3.73's, Ported E7's, Explorer int. w/ ported lower, pulleys, 1.7RR's, BBK headers, off-road H-pipe, flowmasters, subframes, 65mm TB, March ram air ,MSD coil, U/L control arms, 155lph f/p, Crane Adj.FPR, Nitto drag radials, best 1/4--> 13.76@101.4 on a 2.17 60ft