Rarest A-Body Option?

Autoxcuda,

Just curious about where you can obtain this information...
I have a letter from Galen Govier saying that my LS23 car is one of three cars that came from the factory with the mod top on the same day. .. However, it has had the same white top since the early 70's. I didn't know what he was talkin about until I saw the code on my fender tag and broadcast sheet just recently. Anyway just wonderin if any way to confirm that.

Thanks, Kim.