Update: built new frame/floor for the box, will add wood floor. Cut down trailer walls and roof to fit length of floor and will receive inner metal studs and then thin balsa wood will be attached to walls. Braces will be added to roof as well. Sleeper aero skirts have been straightened to match cargo box. Much more finishing to come.
Added some detail, but where to stop. Wanted the motor to look well used but not rusty old. Used some details cues from the archives in this site, not sure how accurate I am but it will do until the next build.