Departure angle is precisely why I opted to stay with the shorter van body. Even so, I manage to drag my custom rear bumper regularly; I'm thinking if I had the longer body style I'd not be able to get to some of my favorite campsites.
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Worshipper of Wild Country
2007 Quigley V-10 on 33s with 4.56 gears (Toyhauler)
I haven't made a hinge in years since a couple other companies started selling them. The instructions above are detailed enough for a DIY'er or fab shop to make it happen.