I register my car to show as modified, not restored. I also have rear seat speakers in the well covers, a TCI trans pan, a quartz clock movement, radial tires and an open element air cleaner. Hagerty Insurance still classes it as stock.
The Le Mans went through tech lines classed as "restored" because it had been repainted, although though it had radial tires they were never held against it.
Vikki 1969 Goldenrod Yellow / black 400 convertible numbers matching