Hey mark!
Sounds like a fun project you guys are undertaking. Rodd already linked you to my post, cause we have a very similar situation. But from the sounds of it, yours is a little easier, cause me and my father have been working daily on getting rust off of the body while the gas tank is away.
My outlook for the job, not being a professional opinion what soever, is to replace the fluids and filters (as to not damage any of the already working components), and turn over the engine. If the engine doesn't turn over, fix something, and try again. Rinse and repeat until the car is running. Trial and error the whole way. Might not be the smartest way of going about things, but it sure is fun.
Have fun with it! It's the most important part of the job. And let me know how it comes along. I'll keep checkin your post if you keep updating us.
-Eugene
1965 230Sl, Max speed: Zero