Would a 4th gen rear bumper from a trans am fit on a third gen firebird.

 

I figure it wont be a direct but how hard would it be?

 

To somewhat answer your question...not at all. If you look at the 4th gen TA bumper, it extends much further (all the way to the fender well) towards the front of the car. The 3rd gen bumper stops where it should...like a bumper. Just look at some pics of 4th gens and you'll see what I mean.