I tried posting some photos that would help, but I got a folder full message. Harold Minty's site explains the procedure.
http://www.pacificcoastairlinerr.com
I will try to get the photos uploaded. The hard part is prying outward and upward the vertical front boiler plate over the chassis tab. The shell must also be pried up over the rear tab first. You have to get behind the vertical plate and pry out and up.