The transition to purpose-built racecars began in the early 1960s and occurred gradually over that decade.
[2][3][4] Other notable drivers included: Ned Jarrett, Buddy Baker, Wendell Scott, Neil Castles, Elmo Langley, Roy Tyner, and Cale Yarborough.
[2][3] A significant part of the field were individually owned vehicles with no formal sponsorship whatsoever.
[5] Both Clyde Lynn and Cale Yarborough shared a single crew member for pit lane.
Many drivers would run an entire race at slow speeds back then if they had no chance of winning.