The B&M would be a fairly easy swap as it is 4 -1/4" mounting screws to the tranny tunnel, a 3/8" hole for the cable and a bracket on the tranny. Follow the instructions and it's a pretty simple swap that can be done in an afternoon. Hang onto the steering column, shifter and linkage in the event you want to go back to original some day. Not to many Firebirds came with the column shift. Just remember every aftermarket add on takes away from the value of your otherwise original car.