rsparlin, just picked up my new 5ver last weekend. Min clearance should be no less than 5" between bedrail and bottom of 5ver. I have 5 1/2".
You will probably have to have the 5ver raised to accomodate the new truck. Mine came with provisions to be raised for high profile trucks.
Good luck
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99 QC/LB,ISB w/auto,4x4, 3. 54, VDO (trans, boost, pyro) Westin SS Nerf Bars, Westin Grille Guard, Contico tool box, CP Industries pivoting 5th wheel, Louverd 5th wheel tail gate, K&N, VA CPC, BD Valve Body, and Mag-Hytec transmission pan. 46271 miles (9/20/00)
00 28' Jayco 5th Wheel, 86 "Classic 16" Alumacraft, 00 Honda Rancher