I knew that the AMA had road raced at Talladega in the early 60s and that it had been considered a important event then. What I hadn't known was that there were additional events, Motocross and Flat Track too.
Good article in this week's Cycle News;
https://magazine.cyclenews.com/i/1460403-cycle-news-2022-issue-11-march-15/140?