All,
Rules are rules. It has nothing to do with how fast or slow your car is. If you don’t follow the rules you run the risk of receiving a penalty. Cosmetics can be viewed different ways. If a car looks like ass but still passes all the rules it will not receive a penalty. Period.
The whole idea of everyone wanting to know what car is “the” car is bullshit. Pick a car and learn how to set it up. What you learn will help you on every other car you set up. It’s that knowledge that will make all your cars better.
Irregular – adjective, contrary to the rules or to that which is normal or established.