Here is an interesting fact I found about the 1968 Daytona 500. Robert Gregory Hendrix on the Stock Car Racers Reunion web site stated that, "Greg Fielden's book 40 Years of Stock Car Racing Volume 3 says on page 169 that the frequent caution flags caused 2 pace cars, both Chevrolet Camaro's, to overheat, and a 3rd pace car had to be brought in." Apparently eleven caution periods, adding up to almost a third of the race, were needed to clean up multiple accidents. He did go on to say that the book makes no mention of what kind of car the third pace car was.
Perhaps this 3rd pace car was the car that appears in the following photo. This Camaro is lettered up completely differently from the pace cars that display the red and black stripes along the side of the car. This picture used to be on the Daytona International Speedway web site where it was titled "1968 Daytona 500 pace car." I found this version on worthpoint.com
If it is not a 3rd Camaro pace car, another possible scenario is that this is one of the two cars seen in the all of the earlier posted photos but it was lettered and decorated this way weeks or months prior to the events of February 1968. Maybe they spent the time leading up to the events looking like this but were then changed to the red and black stripes for the events themselves.
Does anyone know??