I knew there was a lot of wood, but wowzers!!
There was a layer of stainless, or aluminum, then wood panel.
Well on one side of the truck.
On the other side was a layer of melamine ( think ) like a counter top.
Then studs, then insulation, and vapor barrier, then ANOTHER layer of wood panel.
Then MORE studs behind that. So far I think I have gained 6 inches of width.
Which is HUGE in a tiny truck.
Much of the wood is rotted from the roof leakage. So even IF I wanted to keep wood in the truck ( which I don’t ) it would all have to be replaced anyway.