I can't begin to imagine the drama of maintaining a polished bronze car. More difficult than alloy and slightly easier than their copper cars?
Anyway, I love it! Bernie, I think it's the only bronze 289 car. There are some other 427s.
Here's the build:
Kirkham 289 Bronze build
Darren the seller is also the current owner of the flip-top polished Kirkham that has a 427SOHC, which he then replaced with a Coyote motor to go and thrash around the track! He has had some incredible Cobras over the years.