I think a low profile AC adds about 14" to the height. I also think the measurements are from the roof edge, and not the overall height, which for those units without AC would be the roof vents and shower skyligh, and fridge vent. The Winegard antennae, and the waste tank vents should be lower than those.
My SV 263 was listed in the brochure at 8'6" which is pretty darn close at the edge of the roof. But the roof vents, skylight, and fridge vent project up somewhere around 6" which would put me at 9'0" without the AC. My AC puts me up to 9'10".
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263