Brian...
if the question is "which one looks the most original".. then the answer is clear and unemotional. Asking "which is the best kit"...
...w-e-l-l... that can get sticky.
The m-o-s-t faithful to the original look list is short:
1. Shelby (aluminum) - Kirkham (aluminum)
2. Shelby ('glas)
3. ERA
4. Contemporary (used only)
A short list.
it follows with those that are close, with slight design departures:
5. Unique
6. Superformance (not really a kit)
7. Midstates