Wandering around on youtube has killed a lot of time for me, but I found a series of crash tests for the ranger and they are a little scary. Really makes me reconsider caging the truck. Or at least looking into integrating the airbags in my seats with the trucks crash systems. Scary stuff. I wonder how much the energy of a crash is deflected or redirected on a lifted or double lifted truck as opposed to stock 2wd height.

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2000 XLT 4x4, 4dr ext cab, 4.0L OHV, 4.10 LSD
265/75/16 Goodyear Duratracs
Mountaineer seats, Expo OHC
2003 EDGE front clip conversion
133rwhp/192rwtq-->6-28-11

1969 Mercury Cougar
351W, FMX, 3:1 open diff in a Ford 9"
Undergoing restoration

It all depends on the force and the mechenisms involved in the crash such as speed and many other variables