one of 3 '70 R/T's made with a 6 pack and a 727, and it was purchased by Ontario Motor Speedway to be its pace car

'70 Dodge Challenger R/T convertibles are rare enough as it is. They made up less than two percent of the total production that year. Rarer still are R/T Six Packs. Ninety-nine R/T Six Packs came out of the Hamtramck, Michigan, plant, and only 38 had automatics. Of those 38, three are known to have had automatic on the column.

This is one. http://www.highdefforum.com/1190753-post2076.html