I need to find out if the following parts are interchangable between LT1 cars and 97+. I believe they are the same, just need to double check.
-plastic piece surrounding steering wheel. Dome shaped and houses one a/c vent.
-knee bolster - piece just below steering wheel that covers wiring ect and houses the trunk open switch
-trunk open switch

Hey man, I could have sworn that from 1997 on, the interiors were that same...from 1993 to 1996, the interiors are the same...

The overall dash design was not changed at all on the 4th gen. Firebirds. The only things that were changed were the center console, maybe a few warning lights on the guage pod, and of course the odometer. If you need to use some dash pieces that you are inquiring about from a different model year, you shouldn't have any problems.

Will a 97+ console fit into a 94 Firebird?

Yes.