Alternator

On my old 73 dodge dart. That had a 440 with Indy EZ heads..I ran this alt. I had to make some new mounting bushings. To space it out so the belt was straight and had to cut down the main battery terminal some. But other than that it charged great and never had any problems. It keeps up with my electric fan, fuel pump etc.

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I was hoping this had the internal regulator but the O'Reilly site lists this as using an external regulator....is that true?