The Hurst shifter was much too noisy for my taste. Part of the problem was increased noise coming from the torque tube because of the big gaping hole left by the inverted rubber boot and a increase in rattling noise from shifter vibration.
The first thing you want to do is to remove the two shift stop screws. They aren't necessary unless you are going to be power shifting all the time. By removing them the shift shaft won't make contact with the stop bolts so you won't have to worry about that particular noise.
Next, go to your local hardware store and purchase a 1-1/2 " PVC rubber plug.
Take an Exacto knife and cut a hole in the center just slightly smaller than the shaft, apprx 5/8". Do a better job than I did though.
Place upside down over shaft and down into the stock shifter boot that has been turned inside out per Hurst instructions. Note: One 2003 and later models there is a hard plastic ring inside the boot that will have to be removed. You can cut it out with diaganol wire cutters.
I didn't do this but thought about it afterward. You could take some high density foam and stuff inside the opening for more sound deadening. It is very quiet without it though.
The finished product. No bulging and looks very stock.
This mod eliminates the transmission noise that travels up through the tunnel and eliminates most of the rattling expereinced by engine vibration. All in all, a very worth while mod and it's cheap!