Several years ago Bruce Carlton, owner of the 1969 North Wilksboro Camaro Pace Car, wrote up a brief history of his car and included this information on the 1969 NASCAR pace cars. In it he states that,
"These cars were manufactured in October of 1968 (10C on the cowl tag), so they were very early '69 cars. Consequently, they had a short rear spoiler (carryover from the '68 year Camaro) and had no cowl induction hood (not available until 1969). These cars were manufactured in Norwood, Ohio where the majority of the Indy Pace Cars were built. Each car was sold to NASCAR, headquartered in Daytona Beach, Florida and then given to each of the NASCAR speedways for use as their Pace Car for the entire season. Each track painted their logos and track racing decals on the cars and was free to modify the cars as well for the tracks' use. At the end of the NASCAR season, each car was returned to its' original condition (i.e. painted white again) and turned back into the Chevrolet dealer for resale. Each track had the option to purchase the car for half price if they wanted to keep the car.
These cars were similar in appearance as the Indianapolis Z11 Pace Cars, but there were several distinctions. The cars were big block 396 cars, convertibles, Dover White in color, RS, SS, but instead of having the orange houndstooth interior, they had blue comfort weave interior. Also there were no orange stripes on the hood and trunk lid. The rocker panels were painted black and the rear end (above the bumper) was also painted black, which was standard paint treatment for an SS-optioned car.
The 2.56 positraction rear end was supplied for super high speeds. Also the steel wheels with caps were supplied to eliminate the trim rings flying off during pace laps, had the car been supplied with the better-looking rally wheels."
This information appears in a Word document here:
http://www.camaropacecars.com/1969/69Owners/BCarlton/BCarlton.htm