This is from the Monster Mopar website that I and others donated our $250. Seems clear how it was to be raced. Even announced it at the track 2 or 3 times.

"Jeff Allison Motorsports Big Dog Quick 32
1/8th mile
8.99 and quicker
.500 sportsman tree
It will be an all run class but we will ladder at 32 cars if we have more than that
You can not dial more than .100 slower than the slowest car in the field"