COE plan/questions/advice

To begin with, I'm sorry if I'm posting this in the wrong place.

I'm looking at a 98 International 9800 coe with flatfloor that is running a n14 Celect Plus.

But I have a couple issues, and plans for long-term with it, if everything can work out.

To begin with, I'm 6'5" and it's a flat top. How difficult would it be to first find a full-height, or even a mid-roof, and then to change out the flat top for said increased height? If it's even possible, does anyone know where to look? Or would I have to try to find a parts truck that has same dimensions/measurements?

The long-term plans are to:
1) buy said truck and fix whatever it needs (minor things from my understanding so far)
2) find a roof and install (if possible)
3) find a custom sleeper box (90"+) and buy that
4) stretch the frame to fit said sleeper

I know it's a long goal before this truck is up to my visions/dreams, but I think it would be worth it in the end.

Any advice, suggestions, or things for me to think about would be greatly appreciated!

add-on: if anyone has any suggestions for reliable (non-ripoff) shops that do this kind of custom work, that'd be awesome too!

 

what if i said i may have found a 97 9800 that has a full roof? would that change anything? if they match*

 

i understand that, but this is long term...and isn't it nicer when it's something you built instead of buying someone else's baby? just my opinion

 

90 may be a bit on the dreaming side...but i just like the idea of a lot of room to relax in, for me, lady, and dogs. and being coe, adding a big sleeper wouldn't make the wheelbase as bad as stretched long noses.

 

I'd like something like the pics included.