I'm normally not that big into custom work, particularly on Thunderbirds, but I really like what you've done -- particularly with the interior.
All of that woodgrain on what appears to be a non-landau -- the grain on the "Bright" areas of the doors, and especially the seats. The A/C registers are not original, but the round pattern matches the pods on the instrument cluster. In all, it's very nicely done!
It's difficult to tell in the photos, but is the dash painted a color to match the exterior, or is it also woodgrain?
As for the white, I once had a Malibu Classic with white seats. Extra work to keep clean, but they certainly make an impression. Someone back in the day told me to use saddle soap, which I did, and it seemed to take care of it.
Also, what is the exterior color? It also stands out, without being gaudy. I really like it!