School me on Stock Eliminator?

Remember the weight you can take out of it:
Lighter rad.
Wipers
Heater
Sway bar (If it has one)
Undercoating
Sound deadener
Exhaust system
Use lite wheels
Front runners and slicks are lighter than street tires.
Spare, jack
Anything you can remove or modify inconspiciously.

Getting to know a few racers will help you more than you can imagine. There are the written rules, and there are the known interpretations of them. I wouldn't even start til you get this kind of knowledge. Bracket racing is good to get the racing experience.