I have a 69 18 ft caravel. The overall height is approx. 9 ft.
This could vary three or four inches depending on the status of your
axle. I expect the height of mine to increase at least 4 inches
after the new axle is installed. I would at least add 1 foot to the
height there is an airconditioner. Inside my caravel it approx. 80
inches to the skin. However, lights and cranks on the vents could
reduce this by 2-3 inches.
Hope it helps.
Dan
69 caravel
Project in progress.