SS w/D96 stripe...Does the car have RPO Z21? If it does the D96 stripe would apply.
U16 N/A w/U17...U17 is okay as long as the car did not come w/U16 (tach).
I agree w/Bryon...the more pics you can post with pertanent details/numbers referencing this car, the more this site will be able to assist you. Examples; Engine Pad, transmission, rear axle, trim tag, VIN, etc. If you need assistance posting pics PM me and I'd be happy to assist.