Help needed! Stock drum? studs on drum? off of different car? 1972 swinger

One stud is pretty loose cant push it out by hand though weld is broken on the back of that one. And i have two more studs that have a little play. I will convert it at some point to disc. However looks like i would need new rims too because from what i understand stock non-rallye wheels dont work with disc brake kits.

It depends on the disk brake kit, but very few of them work with the factory original drum wheels.