Don't be afraid of posting here - the extreme and vast majority of people that watch and comment on this site are here to help, and not to disparage your car. I've visited other sites over the years where that's not always the case. You'll get what you look and ask about a very high percentage of the time, with fair and honest opinions from just about everyone. I've owned a Z for a long time, and I still learn something about it constantly from the topics and postings here. That's what this forum is known for, in my opinion (for what it's worth).
You've got enough '69 Z owners, experts and aficionados represented here to dissect any feature on the car, start to finish. That being said, when you post your documentation please remember that you'll get a pretty firm opinion of validity, so be prepared for it.
Welcome to the CRG - post away !
P.S. Good looking car - really like the color combo -