"Wheel Vintiques" makes near all the repro Magnums available today. Pretty good quality, but not perfect. Most all of them are out of round even when new. Put them on a wheel balancer with no tires mounted and give a spin...you will see if they ard "round" or not.
Not the end of the world, as most steel wheels back then were never perfectly round. A good wheel balance alleviates most issues.
I sent my WV Magnums to a wheel refurbishing center and they "trued" them to perfection. Overall, made a big difference.
I learned that when I restored my 79 Z28. The factory steel wheels needed genersl refurbishing and they "trued" them as part of the process. Afterwards the car drove smoother than it ever had. Hands off the wheel at 100+ mph and not even a hint of shake or vibration. I was impressed.
The WV Magnums also have chromed spokes, unlike the brushed/painted finish on the OEM Magnum's spokes. Personally, I think the chrome spokes look better, even if not totally authentic.
And, to properly balance them you must find a place with a lug-centric adaptor to mount the wheels on the balancer. The hole in the center of Magnums is apparently not perfectly centered, so using it to mount on the balancer throws off the balance a bit.
Definitely a real PITA overall...
But.........Magnums rock!