I can imagine the vacumm switch being a pain in the arse to put in and figure out how it all works.Probably not worth the effort. I couldnt imagine the voltage being more than 12. So most 12v rated switches from ****smith/tandy whateva should be okay. I good idead i think would be to put the switch next to the transmisson gear selector, on the left hand side of it. U could get some pretty fancy push on/ push off switches with lights in them that would be cool. Just goto that blue wire, snip it in half. run more wire from that to the switch and perfecto.

any old switch will work. I used a dodgy one I found and put it in near tranny shifter, might be better to hide it if you want to sell car at some stage without admitting you have a shagged torque convertor

haha, that would not be a good idea!