The carb looks like it turned to powder. Seems like the air cleaner is sitting on top of a mound of sand.
Too bad it turned out like that. I am sure there was better technology in 57 that what was used to stored this time capsule.
Plastics, rubber seals, tar even a simple drain could have been used to empty the possibility of water infiltration.
Not too much brainstorming went on when they buried her. R.I.P. Belvee.
Jules