Your bus was likely built on a Ford B700 chassis. If it is, I have the same chassis.
You can always take a angle grinder with a flap wheel to the top of your scull to remove a few inches. lol
A roof raise is worth it, not to hard, and not to costly if done smart.
How would you like to be able to see out the window standing up?
How about not having to deal with that awful curved ceiling?
With a roof raise, you can install your door anywhere you want, and use a real house door.
Skoolie windows suck in every way. No screens, they transmit cold and heat, never seal, ect. A roof raise enables you to use real house windows.
The list go's on and on.
If your going to live in it, a roof raise is a must.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization