The races in Michigan was called something like the "Michigan speedway promoters association" mspa. When I was a kid they had a race every weds night at a different Michigan track every week. It was a point series. At the end of the year they had a champion. It was a late model, stock car series. I can remember Chris Patterson was a champion one year. Gary Fedewa got to race at Michigan International speedway on a nascar weekend for being the last years champ. It was some type of Toyota pro- celebrity race. If I remember it right it had some old school beer company as a series sponsor. Think it was carling black label beer. Once or twice a year my Dad would take me to the close ones to home.