March 2024 Update
Began to work on Bus Conversion!
If your device doesn't play the video, try this .webm version instead.
Two original benchs remain within the bus leaving tons of room to design to meet any goal.
This is an All-Steel Bus. Behind the inside steel is insulation and then another steel wall for the outside of the bus (this goes for the ceiling also).
On the left behind the driver's seat is an all-steel chest which has never moved since its installation. It is securely bolted at the bottom and top to prevent any movement. 
