Ok,
We have the following counts.
RMR = 17 cars - nice work chuck
Arizona = 9 cars
So-Cal = 6 cars
Nor-cal = 3 cars
So if we take the best 5 cars that leave out Nor-cal, but gives So-cal and extra spot so they wound be dragged down by Tim Comeau's slow lap times.
So we can do the following.
Use the Az score system for points and add up the top 5 finishers in each region for all 3 races. Which region you are is defined on the entry list. Then which ever region has the highest total points wins a "fastest region" award.
Nor-cal only has 3 cars, but with this system if they still secure the top 3 spots in al 3 races I bet they can out point the other regions even with just 3 cars. So they are down, but not out.
So let the fun begin.