Hey 69RS/SS Start a new post introducing yourself and the camaro you purchased . Make sure to include some good pics, we all love to see pics of the first gen Camaros. I read your other post, and there is a section on here for orphans (cars, docs, motors, transmissions, that people are looking to match up).
It is a needle in a haystack, but guys have found there original blocks from time to time. With the continued use of the internet, now a days it may improve your chances of locating it. Start doing searches on the internet with the full VIN, and partial vin. You would be surprised what pops up.
Welcome to the site, and I look forward to seeing pics of your car!