I have managed to make the rear door close, with a bit of levering and hammering. This has got to go!
In the driver’s side, there is a curious flap/door that accesses a storage area under the seat boxes. The lid is another adaptation, and will need to be re-made.
Inside the cab, there is no centre bulkhead panel, and the other panels have been cut up a bit. This makes accessing the rear of the engine pretty easy, but I will be looking for the replacement panels.