I replaced my shift knob, but it wasn't a direct overdrive replacement. The only way I could remove the old shifter knob was to cut the wires for the overdrive button so I was stuck to rewire it anyways. What I did was this.... I found a momentary toggle switch (not a two position, just a momentary..... the switch appears spring loaded) and I located this on the left hand side centered in the space between the indicator plate and the tray where the handbrake sits. The wires are tiny, so get really small butt connectors and you may even need some solder to hold them in.... i didnt solder and they held just fine, but the toggle will take care of the overdrive problem. I then located a shift knob off of a 4th generation Camaro (somewhere from 94-96 will work... something with a top loading button because that is what I wanted). With this knob I had to drill out the two tabs to make it slide over the shift handle and the diameter was perfect to make it friction fit. Then for an even smoother look I installed a leather shift boot from an MTX Contour and that hid the bare shift handle and got rid of the goofy looking indicator plate. Just make sure you take the indicator bulb out first if you do the shift boot because it will just lay there and you dont want to burn a hole in the leather. If you need some pics I can try and locate a few I took.... other than that, if you want to go with a generic top loading shift knob, do some searching... I have seen a couple online that look pretty slick and they fit any shift handle. But realize that you will need to relocate the overdrive button no matter what. Hope this helps.
