[Dangerous Doug]

I second CSX3183 on the chrome contrasting with the dark blue.

I made an interesting observation at the Monterey Historic Auto Races this year, looking at the originals: most of the originals have strayed very far from "the way it was" to currently available technology. Braided stainless lines, and other things caught my attention. I saw my FIA's twin and it had a stroked 351 in it.
For all the emphasis on matching original spec's, I found few preserved and many taking advantage of modern equipment.

The point of all this is to say, even if you can't find a vintage photo of a 427 with a chrome roll hoop, if you want a chrome hoop then install a chrome roll hoop.

Do what you want with your Cobra's design, for the owners of original Cobras exercise that license as well.

Enjoy your build.
DD