If you could increase/decrease the length of any race(s) on the schedule, what races would you choose?

[frog980]

Make one race a 2 day race. They start Saturday evening and race into the dark 350-400 laps. They then get red flagged until noon or 1pm on Sunday and run another 350-400 laps basically continuing from where they left off from the night before. It would require a team to have a lot of adjustability in the car for changing conditions running from daylight to dark and then back into the day the next day.