IF you just bought it I would say it is worth what you paid for it unless it was a family member. We would need way more info to try to estimate a value. There is no great way how many where made. Yes we know how many SS camaros were built, how many 396's how many rag tops and how many 4 speed speeds where sold. But there is only guesses on how combinations.
If you found a car that was hidden from the world and never advertised and you think it is in original condition BEFORE you touch anything track down a well know authenticator. Have it all original status documented even before you add gas to it.
Just a FYI most of the all original cars that are floating around are fakes and they are fakes good enough to fool a car judge at a show. It takes a real pro to know the real thing. There are undocumented things they look for and if they are missing then will not authenticate it or tell you what is missing. This is why you want to avoid touching it. If you mess with anything they might be looking for you could drop 20k in value.