The one on my 400 was a tall wooden one, I redrilled the hole alot deeper and the result was a gear stick about 2" shorter, much better. As Blaine says if your knob is fastened with grub screws around the base, just get the saw out and lob a lump off the stick
It was sitting a good inch and a half to two inches higher when I got the car. I seem to remember that I just had to unscrew the knob and screw a threaded insert further into the knob to get it to sit further down the shaft.