Hey Chris I noticed that you're a Canadian, eh? Right after I saw your trim tag is Canadian.
Are you aware that you can get the original documentation for your Canadian made car for a service charge? It will tell you who the car was sold to originally (the dealership), and what was printed on the window sticker; and more. But wait, if you act now ... No, no, no, ignore that part!
There is a place at GM of Canada that archives all of the build sheets,. Protect-o-Plate information, and everything that the dealer would have received when he accepted the car from Chevrolet of Canada. I believe they charge $75 for this service (researching and reprinting the information as well as certifying it's authenticity).
Then you will know what you have now compared to how it was when it was originally built, but you also have a blue print to restore it to if you should want to.