truck bed rail and 5er clearance on steep driveway.

If I'm reading this right your were going forward over the creast of a hill.
Is this on your property?
------If it's not I can't help you.
Is it a stone or dirt driveway?
------If yes, take some ground out at the top of the hill to ease the break over the top so the front of the truck doesn't "drop" off the crest.
If it is blacktop or concrete, and it almost hit but didn't, leave it alone and it should always "almost" hit.