About the same. I just happend to measure mine recently. Its a 59. Its 6'7" floor to seeing add 5 inches for roof thickness and the vents. So 7ft without A/C plus 20 inches from ground to floor height.
The height has been pretty stable thought the years. With roof A/C figure 10ft to be safe especialy if the drive slops in and out of the garage. If its flat in and out then 9ft should clear A/C, about 8.5 feet no A/C and vents closed.
Airstreams are about the lowest fixed roof coaches on the market. About the only fixed roof I can thing of that will clear a standard Garage door is the T@B. Its a teardrop with just enough room to stand in. http://www.tab-rv.com/
Now older homes have 7ft doors not 8ft. I would measure yours to be absolutlly sture of the height.