Synchronizer rings

that I believe is the hub, if you put the slider onto the hub and it fits good and doesn't have alot of side to side slop ID say run it...

mine had some marks like urs but they were fairly tight so I'm gonna run them.

but do remember that these transmissions are over 40yrs old, they are all gonna have some wear....if you have the money and don't mind spending it new usually is better lol