[1] The ISMA was founded in 1974 by Jim Shampine and Nolan Swift, who had won multiple races and championships at the Oswego Speedway.

[2] with the help of local businessperson Tom Heveron, they formed ISMA as a forum for owners and drivers to express their ideas and opinions.

ISMA's goals were to improve safety conditions in supermodified racing and to host a larger number of events per season to ensure sufficient purses and support for drivers.

Each of the 19 franchise teams are allowed to miss up to 3 shows during the race season while being guaranteed a minimum starting purse of $1,000 at each event.

The 2024 schedule includes races at Oswego, Evans Mills (New York), Sandusky, Lorain County (Ohio), Lee, Claremont (New Hampshire), Berlin (Michigan) and Caraway (North Carolina).