reverse lights switch
 

does anyone know how you can adjust the reverse lights switch.
when i put the shifter in reverse i have to wiggle it a little for the lights to come on and im shure its the switch and i know its under the car on the tranny linkage but does anyone know how to adjust it or what to look for when im under there?

I have a 1970 and the switch is in the shifter. I imagine its there too in your 66. That is of course if you have a floor shifter. I always forget that some people have colum shifters! It's easy to get to in a floor shifter, you might want to put in new shifter bushings while your in there.