October 1970: SS was Ronnie Sox at 9.77 and Dyno Don at 140.62. November 1971: SS was Gibb-Hayter at 9.63 and Bobby Yowell at 142.95. October of 1972 Pro Stock was Dyno Don at 9.44 @ 145.39. Started calling it PS in 1972. What else you want to know sweet lips!
