There were also national 20th anniversary shows sponsored by Ford. Believe those were the first.
MCA held the eastern version while a we (a group of western clubs) held the western version. The Western version help span the all Ford Knott's Berry Farm shows
I went to the 20th anniversary show in Dearborn put on by the local club, Ford was involved
and we got the chance to drive our cars on the Ford test track, drove my 79 Pace car through
the hairpin turn at high speed, what a thrill!