bigdaddy2607

i am presently using my orginal ign switch on my 66. [been using for last five yrs] when im driving along i suddenly lose ign. car wont restart, but when it sits a few minutes it will srart then i can drive alittle farther to have the same thing happen. i cant find anything obvious so i was wondering if it could just be a bad ign switch? i just replaced the msd trigger but still does it. thanks for any opinions ken