Working on a 1955 marlin 336rc 35rem. I know when they added the cross bolt safety in 84 they changed the front barrel band and screw. My question is did they change the rear one also? The gun i'm currently working on has a stripped rear band screw. Working on chiseling the head to try to get a screw driver to bite to take it apart, but need a replacement and didn't know if they changed them also.