Personally I don't care.. (I have my original 350 totally restored with also restored original powerglide tucked away, -now I'm actually running a chevy 350 (around 450-470 hp) and a beefed up 4 speed th200r4, w.12 bolt moser 3.73) .. -So it's my way of preserving the numbers matching parts without ever to be sorry about anything being broken..
There is a whole program (40 mins.) about the Firebird TA, from www.mpihomevideo.com -they have alot of cool musclecar programs to check out..