Hi capacity to van back?

Looking at a hi capacity 110 pick up. Is it possible to put a van roof & sides on it? It looks to be in good condition & it's cheap from a mate but I dont realy want a pick up as it's a good price i'd be happy to change the back.
I know its fairly easy on a normal pick up. Sure someone knows. ta

Is there not a space between cab and the box on a hi cap? a regular 90/110 pickup is ok

Yeh there is, it's as i thought then a no no.

you can easily remove hi/cap body and replace with std body ,you neede to swap some mounting brackets but theses are bolt on ,just done one the other way removed van back and fitted flat back

Well worth thinkig about, thanks for that.