6" on mine as well. Have come close on a few occasions, like when I had to go up and over a railroad track that was about 4' above the CG entrance road, but took it slow and made it OK. If you need to drop the nose down an inch or so to get level, 6 or 7" shouldn't be a problem, IMHO.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.