Roundback vs. Squareback alternators?

RustyRatRod said
No. Take out the insulating fiber washer only. All you're doing is making sure that brush is grounded.

I tried that and it still isn't charging. That's the way its in the car now, and checking the battery as it's running its going down still. I couldn't get it above 12.12 at the battery at 3krpm, took it to OReillys auto and it failed the test.