Barn find 72 340 duster

It just dawned on me why the inside of the frame rails looked so cleaned. I should have snaped a picture of it but after I got the trunk floor out is was packed with acorn shells. Mice were using the frame rails to store acorns. The holes where the rear bumper mounts up was a straight shot to their acorn storage.Husked shells of any kind are super dry and kept the moisture out keeping the inside of the frame rails mint.......