Jamie cut some strips of dense foam and glue them to the face of the metal behind the back seat...I had that problem with my 73 mav...stopped it cold. then reinstall the back seat. The foam can be found at any fabric shop cheap....
I used 1/4 inch foam from Home Depot, its green and come folded up. It's used on garage doors or basement walls, works perfect Jamie.
the foam idea sounds pretty good. i was just referring to the two things on top, they can be slightly bent to hold the seat tighter to its mounts if they have stretched in time. i will probably have to try adding the foam though
