This event is near and dear to my heart. It is where I got hooked on road course driving.
Midwest F Body Association is based in the Chicago area and is really a message board based club much like this one. They have been running this event for the past 7 or 8 years and are in danger of discontinuing it if they can not cover the track rental for April. I ran one day of their fall event two weeks ago and suffice to say the car count was down.
http://roadamerica.fbody.us/The event is open to any make or model and they have four different run groups based on driver experience. Passing is limited to straightaways, and safety is the #1 concern. Driver instruction is also available for those who want it.
Several members here have run this event in the past. Jeff Schwartz with the Cadillac, the Ultima, and most recently Temptress, Andrew B with his GTO, Cam Douglass with the green Camaro several years ago, and of course myself with my 67 Camaro and several other cars over the years.
If you are not familiar with Road America, it is one of the premier road courses in the US if not the world. Four miles winding through the hills and woods of eastern Wisconsin with the potential for speeds of 160+. It was the site of the 2009 SCCA Runoffs, and regularly hosts ALMS, World Challenge, and IndyCar (or IRL whatever it is called now).
http://www.roadamerica.com
I tried this for the October date but I would like to try again to rally and get as many PT.com and Lateral G members to attend as possible. If we can get some solid interest I would be happy to organize a PT.com/Lateral-G event within the larger event. PHR covered the event in 2004. Maybe Camaro Performers would be a good fit.