Musclecar review Sept '08, page 90. 1 of 7 made, and maybe 3 still exist. This one was bought from NASCAR by Richard Howard owner of Charlotte Motor Speedway at the time, when they were done with it. The first titled owner? Bill France.It's for sale.
http://www.rinstadauctions.com/vehicles/4.htm
This other one is being restored by http://www.vintageiron.bestezsite.com/Our_Shop.html
http://www.camaropacecars.com/1969/69Owners/BCarlton/North%20Wilkesboro%20Pace%20Car%20Article.doc
http://www.camaropacecars.com/1969/69Owners/BCarlton/BCarlton.htm