BrentTFunk- Tom Helfrich told me Friday that they had 10 more cars and a bigger crowd on Sunday last year than they had on Sat. night the previous year when they did the MSCS/USAC show. Haubstadt is traditionally a Sunday night track and I think the casual race fan in these parts had a habit of hitting the Labor Day show on Sunday, hence the better crowd on Sunday.
As far as DuQuoin is concerned with that conflicting with Haubstadt, USAC and ARCA swapped racing days which created that particular problem. You didn't ask about that. I just threw it in here.
Tom had a five year agreement on a handshake with USAC to run a Sat. night show with them on Labor Day weekend but USAC messed that up by creating a conflict with the midget race in Wisconsin the next year. Tom now chooses to do what he feels is best and that is have a MSCS race on Sunday.