I can measure and get back to you. For what it's worth, 6'10" is my "safe" height. So if I am approaching a parking structure, if it shows 6' 10" (and above), I clear with no probs. but I will measure for you to be sure.

 

The tallest part of my truck now is the top of the cab on the third brake light area, which sits at 6' 4" (Stock 2010 FX4 with stock wheels and tires) I also have to be under a 6' 10" structure.

 

Ok, my garage from floor to molding is exactly 6'10" and I have 4.5" of clearance to the top of the cab. That puts the truck right at 6' 5.5" so let's call it 6'6'. That's the first time I actually measured...I always just guessed! I am glad I did because I am planning on adding the 1" AS spacer in the spring!
Go Rancho and keep us posted!