Best alternator

What failed? If bearings failed, and you didn't over-tighten the fan belt, then it was a truly crappy rebuild. The diodes in the early round-back alternators rarely fail since pressed into the housing for good heat rejection. But, a rebuilt alt failed in my 65 Newport, giving some output but not enough, which is kind of worse since I found out when it stranded me. The diodes in the square-back alternator of my 1982 Aries failed like clockwork every year. I would look thru the rear window and see the positive ones, which float in the air, vaporized away. I got good at replacing just the diodes, and by cutting cooling slots got them to last 2 years. Since Darts didn't have that problem, my guess was the transverse engine orientation didn't give enough cooling. An auto-electric shop where I bought replacement diodes told me that failure was common in the then-new Mopars. Even with good air flow, Chi-made diodes may not last long. Brushes should last for decades, but who knows what cheap stuff they may make them out of today. When my 65 Newport stopped charging in 1992, I found the problem was the brushes were worn and the copper pickup rings had worn grooves, so guessing the original alternator at 27 years. I just stretched the springs for better contact and it worked again (living in desert then, far from auto parts).