The microSWITCH, just to clear that up, can be found at any electronics store. There is a local "Active Surplus" here where these thing come really cheap so I bought a few, and used the one that was best suited to my needs.

I fasioned a braket that screwed in to the chrome shifter, righ near the bottom. The microswitch is also attached to this braket and is positioned so the detent collar hits the switch on it's way up. The detent collar is the one that actually stops you from accidentally engaging reverse, right at the bottom if the shifter. You will need to remove the shifter to do this.

I just finished the installation today and it works great. Totally hidded!

I took some pictures of it which I will post when they are developed. I'll do a little write up on it.

Rene