The last time I had a car judged at a national, it was 2 points marked off for each "Non-KF" item. There are certain things I won't change. For instance, the Henry J originally had an outside lock on the passenger door only. I moved my locking handle to the driver's side (just like many owners did back in the day...) because it's a pain to slide out of the car on the other side to lock the door. To me, it aint worth two points to leave it original and have to do that every time I drive it! I lost 2 points for that and I knew I would and should but I chose to leave it that way. Also, a previous owner installed a Darwin remote master cylinder resevoir on my other J and I'm leaving it on there. Filling the master cylinder on a J is a major pain and I'd rather lose 2 points than have to deal with that every time I need to add brake fluid. The Darwin is "period correct" for the car so so be it.