4) I've never had any problems with a three wire delco alternator properly hooked up charging right off start with engine idling at 500 - 600 rpm. No reving required. The Delco one wire alternators do have to be reved up before they will charge.

If it's being properly energized it should charge without having to rev it.

I like fusible links rather than fuses on the charging circuit as well.

I also prefer a volt meter over an amp gauge after a 1966 Pontiac Catalina caught fire behind the amp gauge.

I'm surprised the alternator doesn't burn out if there is no load on the battery lug. Usually the voltage spike will burn out the regulator or the diodes or both. That's why they don't recommend removing a battery terminal while the engine is running to see if the alternator is working.

Sometimes folks get lucky though. Usually not me.