Trans Am used to be an important series back in the 1960's. It had the backing of Chevrolet, Ford, Dodge, and American Motors. It had top drivers such as Dan Gurney, Parnell Jones, Mark Donohue, Peter Revson, and George Follmer. Alas, when The factories left, the series became a 'club series'. The series still does exist, for better or worse and has had some competitive seasons.
Here is some drawing of the 1995 season. First with Champion Tommy Kendall