[Eman]

You're looking at bracket or index racing from what I assume. If so the only rules that apply are safety rules. Generally the only racing tracks do on a weekly basis is ET bracket racing with possibly some index racing, no actual class racing like the old days. Then you can choose whether you want to run a footbrake class, a no box class or a box class. All of which have to do with how you launch the car more than anything.
I don't know what track you're referring to. look to see if they are a sanctioned track, either IHRA or NHRA and then look at their web sites for rules concerning et classes.