According to contemporary sources, a 450 horsepower LS6 equipped SS 454 could run 0 to 60 mph in 6.1 seconds and cover the quarter mile in 13.44 seconds at 108 mph. To order an LS6 Chevelle you first had to add option RPO Z15 (SS 454 equipment), at the approximate cost of $500, and then you added the RPO LS6 option and an additional cost of $263.30. The LS6 made an under rated 450 horsepower at 5,600 RPM and 500 lbs.-ft of torque at 3,600 RPM which are some of the most impressive numbers in the industry. No production engine has ever had a higher factory horsepower rating. A total of 4,475 LS6 Chevelles were produced in 1970.