the column has a different lower bowl. No shifter knob. you will need to make a hole thru the tunnel for the cable. You may need a different shift arm on the trans as you have to hook the cable to it. You need to retain the linkage to the column to keep you neutral safety and back up light working properly. I may still have a couple parts laying around if you need them. I definitely have the column still its hanging on a hook on the wall
Definitely maybe on the shift lever on the trans. If a car came optional floor shift usually gm used the lever that had the cable provisions for simplicity sake. But not always. As for the back up lights, neutral safety and column lock; the shifter has no effect on that. All that mechanism is in the column and if you remove the connection from the column to the trans you will lose those features. You could use the switch on the aftermarket shifter to illuminate the back up lights and even the neutral safety, but the column won't lock. You would have to turn the collar on the column every time to lock it and release the key or pull out the lock from inside the column and leave it in the park position at all times.