Any hints on how to shim, tighten, replace tailgate hinge/pivot on a ‘57 3200?

Last edited by DES57; 09/26/2022 1:00 AM. Reason: hinge/pivot

1957 Chevy 3200
Daily Driver
PS, A/C, Tilt column, Rebuilt 350, Rebuilt TH350, Reupholstered Bench Seat, sound proof/insulated, LED headlights/taillights/backup lights/interior courtesy lights.
Follow in the DITY