In Tennessee you can use a vintage correct TN Plate and use it FOREVER with ZERO registration renewal cost for as long as you own the car.
Total Cost for the lifetime registration is $32.75
Pay it 1 time and you never mess with registering the car ever again.
In TN there are no smog checks (except for around the Nashville area) or inspections required for ANY cars.
Here's my vintage 73 TN Tag; its been on there for about 15 years now.