Chryslers at carlisle 2014

well got the vacation time scheduled to go to carlisle this year. my question is what class to register my car in. see two possibilities in the registration form 1) special intrest station wagons stock and modified 2) C-body full size. haven't been to carlisle yet so looking for suggestions. have seen a post somewhere on here where the special presentation area's are kind of crowded. looking for some advice from the experts. car is pretty stock except for dark tinted rear windows, 3 point front seat belts 15" magnum 500 wheels