NHRA (IHRA?) stock eliminator - Fees? for 23.47 Weight break ??

Thanks! I've visited most of that, but some of it is vague. Some of my questions are probably tribal knowledge and if you've not played the game, you just don't know.
Can you just show up with a car and say "I'm entering Stocker class today".... ? Or, do you have to have a NHRA number and membership ?? These are the type of questions that's assumed you might already know.
Some of the basics like the cam lift and no porting I already know.
YOu will need to have a car that fits in a class, and know what class that is, have a legal car, that car will be weighed, you will need to run the correct fuel, no pump gas, and you will need to run faster than your index. if you cannot not, that index number will be your dial in. check out Class Racer Info