Here is the regular Sunday index schedule. That's as much I could find for right now. So unless you have some retarded IV ring that I dont know about, then you'd be running in Index 2 if you did run.
Gates open at 8am. Time Trials/Racing is set to start at 9am.
http://www.nationaltrailraceway.com/apcm/templates/news.asp?articleid=41338&zoneid=23