I have a 6 of 79 fj40 U.S. spec. I am having a difficult time finding an alternator that is rated for my year that has an external regulator (Current alternator bearings going bad). Amp meter is rated for 55 amps. From what I have seen by searching 1 of 79 was the last year for external regulators. So why does my truck have an external regulator? It's clearly a factory installed bracket on the fire wall and factory wire plug. I'm confused as to why my alternator is not internally regulated since it's a 6 of 79. Also does anyone know what the factory alternator is rated for a 6 of 79? I only run front and rear fog lights. No other accessories and no AC so I do not wish to upgrade the amp rating of the alternator. Thanks in advance.