For the first question, each of the different race lengths should mean each event lasts no longer than 1 hour.
For the 2nd question, I can give you a little more information for each of the options here,
- Specific car would be the same format used this past weekend, i.e. you'll be in the stock version of a specific car
- Car-type, PI, drivetrain would be broken down like this, musclecar, 600 PI, RWD
If you need more information, ask away, and I'll add the Q&A to this post, so the same question isn't asked and answered multiple times.
This topic will be open for 2 weeks, after which we'll get down to the organisation of the league(s).