You can visit the rules here:
http://www.purestockdrags.com/index.php?option=com_content&view=article&
id=48&Itemid=53 When your car goes through tech inspection, the main objective is to be safe. Every car needs some type of radiator overflow bottle or "catch can" secured to the car. Make sure your battery is properly tightened down. You wouldn't believe how many guys try to race without even checking how their battery is held in place. They will look for a driveshaft loop and helmet if you are quicker than 13.99 seconds. Loose fan belts or other underhood items. The car should look correct, proper underhood components such as air cleaner, valve covers, intake and exhaust manifolds.
The event is a great time, hope you'll bring your car in the future.