NOS vintage hub vs modern hub
If period correctness is not an issue, a modern cassette hub is the better choice. The problem with old freewheel design is that it puts the drive side bearings in the center of the axle where the weight of the rider can bend or break the axle. Modern hubs either put the bearings to the end of the axle or use an oversize axle that can take the load. Other benefits of modern hubs are that because the freewheel mechanism is part of the hub, you don't have to pay for new one when the cogs are worn out, cassettes are easy to replace because they don't tighten themselves when riding and finally, there are lots of affordable decent quality cassettes to choose from.