As far as scoring the performance stuff. we can use the same scoring set-up that grassroots uses for their 200x challenge.

Here is a portion:

"The dynamic score from the challenge will be scored by adding the competitor's fastest drag time and their fastest autocross time together. This will give their "dynamic time"

The lowest dynamic time worth 100 points. Points for second and subsequent places are
determined by dividing the winning time by each other time, then multiplied by 100.

For example, if the winning combined dynamic time is 74.2 seconds, and second place is 75.0 seconds, the 74.2 driver receives 100 points while second place gets 98.9 points (74.2/75.0=.989 x 100 = 98.9)."

Here are some ideas for the categories:
Drag race, Autox, 1 Lap around an oval (bmp oval?), braking 80-0