I installed the cut-off switch thirty years ago and never have had a problem. In fact I never had any electrical problems (other than all high beams blowing out a decade ago) until I got into replacing the ignition switch, light switch and dimmer switch and Hdlp bulbs. Fixed the high beam problem then decided to rebuild the alternator and replace the voltage regulator for good measure. I should have stuck to the old adage; if it ain't broke don't fix it.
Guess I'm going with a Bosch alternator next. Thanks to all of you gentlemen for your help.