I did this to my Fiero years ago because the aftermarket cd player wouldn't eject if I was in park because of the shifter height.

You can use a shift knob for a manual shifter too if you put a piece of copper pipe inside the knob to fill up the difference. This way you also have no button to push, you either lock the knob down on the shaft to bypass the button, or leave it floating so you push down on the knob to press the yellow plastic piece.