I recently bought a 71 Chevelle VIN 1363711515940, Canadian built. Appears from what I read to be a true SS from Oshawa. Any ideas from anyone where I can find codes on this car or possibly a build sheet?

Call George Zapora of General Motors of Canada at 1-905-644-5843. For about $40 you can get documentation for the car. The paperwork you will get will include, build date, shipping date, selling dealership, engine codes and all options the car had from the factory. I have the info for my car. It is well worth the $40. You can get this info on any car built in Canada and any US built car sold new in Canada.
James