Originally, I inserted the C truck lights because I had positioned them to "extend" the line of each grill slot (the C truck headlights have matching parking/signal lights below).
Everyone here (my peeps) thought it looked better with just the headlights (one row), so that's why I mocked it up like that.
Personally, I like the hidden lights. I'm thinking this:

...would make a good donor for the headlight mechanisms/doors.
I think this mockup looks very R/S-like, yet still fully like an A body (Chevelle).
...Although mine isn't a convertible.