I'm starting to think its an epidemic..

Oh puhlease......she don't need a chebby alternator on there,it's a simple system that has worked for over four decades....she's tryin to fix it right not rigg it up.two components to the system that can be tested for free at the local auto parts store and the wiring which is simple also.wish you lived closer it'd be workin already.
worse comes to worse someone in your town at a auto electric shop can convert your altenator into a single wire altenator, and when your rpms increase to around 1400-1600 rpm it will charge without all the other mess.