Turn signals and back-up lights...

So, as I take my '67 Valiant apart I've been thinking about changes and/or improvements that can be made to the car. I was looking at the tail light assemblies and had an idea.

The Valiant originally used a combined brake and turn signal bulb. I believe there's merit in the idea that a separate, amber turn signal is more visible than a shared brake/turn bulb. Since there's the white back-up light section below the red brake/tail/turn signal, I thought about running an amber bulb there and using the back-up section as a turn signal, then doing something else for back-up lights.

First, do you think it's worth it? Second, were there any other A-bodies that had a separate back-up light that was placed somewhere else besides the tail light housing? How about other mopars in general? Maybe bumper-mounted, or mounted in the trunk lid?