Timeline

The metal supplier should be able to bend the deletes for you at a reasonable price. I only needed 2 sides bent doing it this way...

Glad you walked away, nice size bus though. My bus has 164k miles and it's 2500 series trans has already been rebuilt. This thing shifts...

The front area has a lot of places it would be hard to insulate. I welded in a heavy duty bulkhead and built a wall with 3/4 ply then...

From what I've read here is you may need to push that plunger a long time like hundreds of times. On this bus with the same set-up...

Yeah the amazon reviews on these are not assuring, dangerous and worthless are mentioned often...

2" will be OK, you won't bump the ceiling walking in your bus.