Yep, I agree with you that black was probably standard. But, I am not going for a totally 100% authentic restoration. But, any changes I make from 100% authentic can easily be undone (or set right) by any future owner. With that said, I think chrome will look better to help offset the odd chrome/SS bits that were original such as headlight bezels, door handles and windshield divider.
The other reason is that I don't know what sheen is on the black arms and then I would probably have to sand and paint to match what I am doing with the vent window frames, running boards, and wheels (gloss catalyzed single stage urethane black paint).
