Considering the frame and body is identical except the front and rear bumper and the rear spoiler I'd imagine it would work just fine. Every thing on these cars are interchangeable between camaro and firebird.

 

I looked into it a bit but I'm gonna try the same. I use to have manual Windows so maybe that will a problem.

 

Mine is all manual too lol

 

I was thinking about the firebird door panels as well. They just look so much smoother and rounded than 4th gen panels. Plus on my panels, where the window buttons are, is cracked from the P/O unsuccesfully removing the doorpanels