As bbond105 pointed out some cars have a light switch that is different from the later models, as I have stated mine is. It's not a 64 Impala. And all the free junk yard switches in the world aren't worth a dime if they don't fit. As I have a switch that turns the brake lights on it's an easy wiring job to use a $2.50 5 pin relay and wire it N/C in series with a vacuum switch and the governor pressure switch to have correct and automatic function. It's been educational, but I now have a good understanding of how the system works and how I want to set it up.