Wagon Cargo area floor question

[GGs66GT]

I had a '64 Dart wagon 30 years ago . I now have the back seatback and over the axel floor panel .
But I don't remember what the Cargo area floor was like .
What was the lift up part made of ?
What were the side extensions made of ?
Pictures would be great post them if you have them please .

Thanks

 

[valiantwagonguy]

The lid is plywood and the floor is just a standard trunk floor for any Valiant or Dart of that year with the spare tire well.I replaced mine years ago

 

[GGs66GT]

Thank you for the pics . I had a feeling the trunk floor was the same . I see the side filler panels were welded to the inner wall .
What supports the lid at the rear and how far back does it go ? Is there a filler panel there also ?