The Greenbrier Concours in WV is having a Viper class this year. I am thinking of attending. You do have to make applications, and be accepted. Not sure they will deem my 2013 Track Pack car worthy, but I bet an early Gen 1, 96 GTS, or any ACR would make the cut. This is in September.
PS - Cool thing about this show is that cars must be able to enter the show field under their own power.
Here is the link
http://www.greenbrierconcours.com/concours.html
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