A Ford 3G integrally regulated alternator is the best choice for replacing old 1G externally regulated alternators on amped-up muscle cars.

In 1994, Ford reengineered their alternator to fix these issues. The new 3G based alternator featured an internal fan design, integrated regulator, and higher output.

That’s what makes a high-output 3G a great upgrade for any Bronco or F-Series owner running either of the alternator’s predecessors.