Not familiar with your 5th wheel but I have the same adapter on my Keystone Cougar. I don't mean to state the obvious but....on my 5th wheel the box to which the adapter attaches has 4 different sets of bolt holes for approximately 4" of vertical adjustment to the trailer. I pull mine with a F-250 and there is plenty of rail clearance. Are you maxed out on vertical adjustment or is there no adjustment on yours?
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