Here is an ad for Valvoline featuring the 1968 Pontiac Firebird of Jerry Titus and John Ward that finished first in class and third overall in the 1969 Daytona 24 hour race. The race started at approximately 3:00pm eastern standard time on Saturday, February 1st and ended twenty four hours later on Sunday, February 2, 1969. The obviously appeared sometime after that. While the race was not a part of the Trans Am series this year, a large field of cars was entered in the Trans Am class. I found the ad here on this web site. I believe Jon Mello posted it.