See... the majority of NASCAR fans can't do that. They got confused with the old 185 point system- which was more simple than what you have.
If you're going to have an uneven point system, make it meaningful. If you want a 50 point scale, then 1=50, 2=40, 3=35, 4=25, 5=20, 6=15, 7=14, 8=13, and so on until 20=1. No points for 21st and on. No points for leading a lap, most laps, pole, or even extra for the win (there's a reason you get 10 more points than 2nd). Also, money only pays out until 30th. Three other important rules: 1 lap down or more cars park it during GWC, Restrictor plate races are always single file restarts with no GWC, and the Chase starts out with 12 drivers and one is eliminated at the end of each race with points accumulating for the 9 races until the final race, where it's reset for the 3 contenders.
This resolves: Making winning more important, eliminating the top 35 rule (that wouldn't apply), the start and parks or "also ran", and if you're 100 laps down with a modified because of a wreck- you just park it and it helps clear out the track, and the Chase is made simple- don't be at the bottom.