I see that the Haubstadt race is a 50 lap race; but I can't seem to find out how many laps the b'ton race is.

Something I did find from the MSCS web site that looks great to me is the quote below.
"The combined purses for the two races is in excess of $40,000. That does not include tow money which will be allocated for the drivers who fail to make the feature. MSCS pays one hundred dollars to drivers eligible for tow money. Twenty cars will earn starting spots for each feature. MSCS has a feature provisional 21st starting spot which will be offered to the first eligible driver on the provisional list if needed either night. Friday nights feature pays $225 to start and Saturday night the feature start money is $250."