Jon, this just occurred to me that you might
not know this: The lug nuts on the driver's side of older Mopars are Left Hand Thread
, so beware if and when you remove those wheels. This practice stopped around '71 but your car definitely came from the factory with Lefties. The studs were marked L and R.
Unless........someone, somewhere, at some time in the past 52 years unknowingly hit those Left nuts with a 200 ft-lb air gun and wrung 'em off. If THAT happened, the studs were likely (but maybe not!) replaced with Right Hand items. So again, beware of that.
This was common knowledge in the 60s/70s for anyone working on those weird Chrysler products, but today it you were to take your Hurst into Tires-Depot-R-Us, the young guy with the gun would have zero knowledge of this. We see this subject all the time on this and other Mopar forums.
In the pics of the studs below you an see the L on the left side and R on the right side.
Best of luck with finding those two correct rings.