We recently purchased a used 2012 3750FL and my only hesitation in purchasing it was how close the rear lifts and spare tire are to the ground. Last weekend I moved both rear lifts up 3 holes, ~3 in. Other than it being a little awkward to get to them, it was pretty simple job. I may have to place a couple blocks below them before leveling but for me that's worth the piece of mind.
I also purchased a few more bolts, to be installed this weekend midway between the newly positioned ones. Oh yeah, I queried Lippert on the proper torque for the bolts, 102 +/- 15 lbs is what they said.
Before photos...
https://drive.google.com/file/d/0B1R...w?pref=2&pli=1
https://drive.google.com/open?id=0B1...XJwOEpNMVhtQkk
After...
https://drive.google.com/open?id=0B1...VJNeFVUdTRRd2c
Now to find a new place to store the spare tire...
-Ray