69 big block nova

[yenko crazy]

Hi guys, I've been a member for a lil bit now but this is my first post. Today just seemed to be the perfect time as I have a question about a car I just bought. It is a 1969 Nova with a big block 4 speed factory black bucket seat interior, Factory ralley green paint with black vinyl top. Was told by previous owner that the big block was original and numbers matching however I was unsure because its a 427. Although I havent checked suffix numbers myself, the casting numbers are 3963512, and date code 69. Just wondering if there was anything I could look for that would tell me if it's a Yenko like body, suspension, or any other sign that would distinguish between Yenko to just factory big block car.