I always thought you needed a roll test if you were 4" higher than stock. That 4" includes all lift provided from suspension, body lifts and tires. I think they measure from the ground to the bottom of the door sill or door handle? Regardless, sounds like you'll need the roll test.
That's a good link. Wish I had such detailed info when I had my Jeep.
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2008 F150 4.6L 4wd
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