The VAMP series in Kansas City has another race upcoming October 8th at Kansas City International Raceway. They will have DR which has some relatively open rules main rule is Blown or Turbo on 275's, N20 on 295's. 8.5 class is more restricted. Mainly single stage plate class with -4 lines and no 7531 ignitions. A F1R or 88mm can run in 8.5 but intercooler must be in front of firewall and no alchohol. You can run on Hoosier 26x8.5. Also have heads up index classes which are awesome everything from 10.00 to 14.00. Here's a link to site. Also another race scheduled for October 15th at Heartland Park Topeka, KS.