The last 5 cars I've purchased dating back to 2001, I've known more about the car than the salesman. I could say the same for just about any purchase I make because I like to do my research.
Compound that with the low volume production of the SS and I don't really expect the dealership to know anything about the car.
2016 PBM, 3 pedals, hole in roof, pristine rim in trunk
1965 289 A-code, convertible, toploader - in pieces