I was very pleased with the 3 day Panoz school at the Texas Motor Speedway. The Panoz cars are well built and give a lot of confidence. The cars are somewhat similar in size, layout and drive train as most Cobras. I don't know how far you are from TMS but you might ask to visit sometime when they are having a class. They combine the outside oval and the infield track. You get lots of seat time. You can also get SCCA licensed for completing the school. Their site is
http://www.panozracingschool.com/Racing.asp
Panoz also conducts Open Track Days throughout the year. After taking their 3 day class you will probably what to take your own car out on the track and practice what you learned. I believe that the cost of the Open Track Days at the TMS location is actually less than what is published on Panoz web site.