back in my junkyard ownership days, 1972-1984, we parted many, many chryslers, and some had bolts, some had studs. this also includes dodge trucks as well.
i do not count myself as any kind of expert on anything, but this is just my life experience.
this leads me to believe what was in the parts bin was used, but .
these vehicles, after all, were crashed, or junked for a reason, and they relatively new at the time.