I have a 1997 pontiac firebird{non-formula} can i put formula tail lights on it?

When it comes to GM products (especially Firebirds and Camaros) almost all body parts are inter changeable. The taillights will work, just unbolt the ones you have now and bolt the others up. Just make sure you get the right body style though. (i.e. the 80s style wont work in the late 90s models.)