Hub centric

....and to be clear, I'm not knockin hub centric wheels like aluminum slots. I have a set I'm going to run on Vixen. As long as the center correctly on the hub, they can have a little play in the direction or the rotating wheel either way and they're still fine. It's the lateral play in relation to the hub they cannot have. In other words, hub centric wheels are usually very application specific, because in this case I don't know if there's another application that has the same size hub register as the A body Mopar. These slots I have are dedicated FOR the small bolt pattern A body Mopar with the smaller hub register. They are not unilug, so they are very specific.

What you describe sound like they are hubcentric. They were probably made in a time when wheels were made by application to fit and are likely higher quality than you can get today.

Rings were brought in so a wheel could fit the same offset and bolt pattern among brands that would have different hub sizes. That said, I've had mine lost by the tire store jockeys and didn't notice the difference until I did a brake job and noticed they were missing.