Jeep burning up voltage regulators

I have a 1944 Willys Jeep and Its burnt up two regulators. I recently converted it to electronic ignition. Its running on a 12V system and desperately needs to be rewired. What happening is when the ignition is on (running or not) the voltage regulator get very hot and smokes. :angry4: I dont know if its a short because everything works. Any ideas??

Evan