gas shocks would likely be your best fix
make sure that they don't have but a few pounds of pressure
too much pressure will tear the fiberglass
i think originally torsion shocks were used
this is a video on how the Rambox lid is replaced
they unbolt the lid from the torsion rod & lift the lid straight up
Easy way to replace a cover of a Ram Pickup Truck..#ram#gj #rambox#replacementparts #replacing
www.youtube.com