Most all of us viewing the photos of various bits, parts and pieces can readily identify each and every bit.
We've all "been there, done that" when it comes to a complete tear down / rebuild of an Airhead.
You will be at a great disadvantage without experience with these bikes.
Get to know some of the local riders / Airheads and make some new friends who have some knowledge with the bikes.
Take your time, read, study and pay attention to tips and hints shared. You will require assistance.
If you don't know....Brush up on basic 4 cycle engine technology and get a grasp on "what does what" and "when"
From what I'm seeing this will be a long term project / commitment. It will be worth it when you're done, plus you'll know the machine intimately. ...and your Dad would be proud.
BMW's of that era are really quite simple machines. No rocket science what-so-ever.
I've been messing with them for 20 years and am still learning..... know just enough to be dangerous.