Originally Posted by Tdi-337
Ya I think we are going to leave the sheet metal and build up on top of it. It seems easier and the space gain would be zero if we leave the rails
Just throwing this out there in case it might help your decision.
For metal cutting shears they are pretty cheap and would make the job simpler. Unscrew all the metal panels under the window (hopefully yours are screws). Then use the shears to cut the metal an inch or two below the window all the way down the bus. That way you remove a majority of the metal without messing with anything structural.
You're right about it not giving any floor space. But putting insulation on the outer skin and removing the inner skin will help a lot with heat transfer to keep the inside more comfortable.
It's what I'm doing to my bus right now.