Now that is a great "in the process" photo! You don't get to see many real era photos quite like this one. I have seen the few drawings in the secrets of speed articles written way back when. But actual photos? Very unusual.
Thank you Herb!
And no doors would have made it hard for the older couple to get in and get out..
Maybe their son who was building it and took the picture?
Perhaps there is a door on the right side of the body.