Agree with all the above comments - a lot of money for a car with a lot of questions. However factory black on a '74 Z28 is quite the find!
Not a single undercarriage picture either...that's almost always a red flag for me.
I'd almost assure you it's an original stripe car, OR the fenders have been replaced. The fender emblems are way off in their location, they should be further forward by a few inches. The original Z28 emblems had locators and fasteners behind them so there would be holes in the fender.
Here's Charley Lillard's survivor '74 (the best '74 Z28 benchmark car), note the fender emblem location.
