What are the front rims and tires?

Most , but not all factory steel wheels changed from 3 tab ( nubs or whatever you want to call them ) to 4 tab , late 70 early 71. After dealing in Mopar steel wheels for many years , that is what I have found. Don't know the reason , maybe some else can answer that. Aftermarket mostly makes 3 tab , except for the cop wheels , always 4 tab.

Frank
The Wheel Guy