I would say that try this link, if you have not seen our registry page, as it will give you some insight into what to look for and what the car is about.
http://www.zr1netregistry.com/
Also, from there you can link to our forum:
http://www.zr1netregistry.com/forum/index.php
and post up with any Q's you have. Oh yea, you may have a very great resource right in your neck of the woods, the FBI....Fast Boys from Illinois, a great wealth of ZR-1 knowledge and a great group of Z owners. They can help you with all the details of looking over a Z.

Tom