Wow thanks for all the replies so far! What I was able to deduce from my previous thread, http://www.348-409.com/forum/threads/1959-biscayne-348-4-barrel.23242/, is that this car shares a lot of common features with the restored 59 Police Interceptor that's at RK Motors in Charlotte. As DonSSDD posted above, you can watch the video of the Charlotte car, and see the side by side comparison of the cowl tags from that car (silver tag) and my car (blue tag).
Of course, no one at RK Motors can tell me anything about their car, who owned it, who restored it, or where they found it... I'd imagine they had some means of knowing that it was in fact an old Police Interceptor, but so far I haven't been able to find a list or even a reference on how to track down those cars. Also, it wasn't unheard of to have 2-Door police cars back then. Just check out quik9r's post up above, or look at this Police Brochure for 1960 featuring a Biscayne 2-Door Sedan on the cover. http://www.348-409.com/literature/60copbroc.html
The Charlotte car is believed to be a Police Interceptor like the one that was originally featured in the Dec. 1958 issue of Motor Trend in an article titled "I drove a stock Chevrolet 135MPH!" and it is even available here on this site, http://www.348-409.com/1959_policeroadtest.html for you to check out! According to the article, the brains behind those cars was Zora Arkus-Duntov. You can also go on Google and just search "Zora's Biscayne" and a few interesting things pop up too.
There are some differences between my car and the Duntov cars, most notably the engine. Judging from the fact that the passenger side door and fender had been replaced on my car, it's possible to assume that it may have spent some time in the shop or junkyard, and had possibly had its original engine and transmission removed. It was originally a 3-on-the-tree, but judging from the nice square hole in the floor, I think someone stuck a 4-speed in it at one point.
When we found the car it had been stripped of nearly everything; the transmission, the rear end, the shocks and springs, the wheels, even the fuel tank, but the engine was still there... Is it possible someone knew it was a cop car, with cop suspension and brakes and such, but they knew the engine wasn't original so they left it? Why else would they have left a complete W Motor in the engine bay and take almost everything else? Unfortunately the previous owner had passed away some years ago, so answers are not forthcoming...
I'll keep searching and I look forward to reading more of your thoughts and opinions as this thread grows. Thanks for reading!
Whay makes you think that isn't the original engine?