The antique plate issue is more about the insurance you carry. Most companies that offer "antique" insurance put regulations on how many miles you can drive that "antique" vehicle in a year. And usually limit the driving of the vehicle to Sundays or traveling to car shows/cruise nights.

If you were to register with standard insurance you dont need to worry about those regulations.

You can also dual register your vehicle if you like. You can actually have the vehicle registered with passenger plates and antique plates.