Had to rebuild the chimney 2 times, but alas! it is done, and retrofitting the van went well!
I made a platform for the stove to stand on, that is off of the wood floors. I also put metal against the walls, then using aluminium spacers I laid down some more metal about an inch away from the metal on the walls. This way, as the metal heats up the cold air rushing past it and cools it.
The chimney is also tripled walled now, there is the insulated stove pipe, then I put corrugated tin, then a metal casing to hold it all in place as it exits the van window.
For added safety, I started putting down my collection of sings and licence plates, this is just in case an ember or spark flies out of the wood stove, instead of landing on my “hard wood” floors, it will burn out harmlessly on the metal!