A blast from a little further into the past.
Sebring 12 hours 1956.
The action really starts about 3 mins in and then there is a lot of sun and concrete but near the end is some coverage of the tighter part of the track and a few minutes that offers some night shots though of course there is not much to be seen from the technology of the day.
I noticed the drivers seemed to be mostly wearing helmets and a few even had overalls of sorts.
https://youtu.be/jKT1Wl9RkjA
Longish tea break required.