this site has a pretty decent pictorial history,inc alot of the rare stuff:
http://www.firebirdfever.com/firebirdfever/82-92ta.html

 

Sorry, but that page has quite a bit of errors. Just a few quick, major, errors:

It references several pictures as "1992 Trans Am GTA 5.7 Convertible" - which did not exist.

It also references a few GTAs as Trans AMs and vice-versa (atlteast from the pictures - who knows what they really are - but if you're going to just show pictures, using non-stock vehicles as examples is not a good guide)

It references the new 5.7 liter (350 cid) V8 as having "Throttle Body Injection". The 350 was not "Throttle Body Injection" on these cars but instead was "Tuned Port Injection". There's a significant difference between them.

 

didnt notice that...picture wise it seems useful though