1. Look in the NCRS "Driveline" for guys who rebuild transmissions. If you have your original transmission, it's a Borg-Warner T10. They can be tricky to rebuild. Find somebody who knows these transmissions. Common problem is that they pop out of 3rd, 4th, and/or 2nd gear (in that order of commonality) under de-accleration. This can be tricky to fix. it's a fussy adjustment problem.
2. You can purchase the camshaft and hardtop side windows from the usual Corvete parts vendors. See Paragon, Corvette Central, Dr. Rebuild, Zip, Ecklers, Mid-America, etc.. If you only replace 1 window, the other one will look funny. These windows are dated. They are difficult to replace. The camshaft is one that takes solid lifters. Some people replace these with ones that take hydraulic lifters. If you want to stick with solids, some people like the later LT1 camshaft.
3. Can you run VINs on the NCIC, NICB, or NAT? How can I, Joe Civilian, confidentially run a VIN that is not in the usual format in order to determine whether that car was ever reported stolen?