I installed a Nippondenso 120 Amp Alternator (for a Dodge Caravan or newer Dodge Truck) on mine and converted to Hydroboost Brakes (since i no longer had a vacuum pump). The ND Alternator is almost the same (dimensions) as the Mitsu Alternator. You can even use the same brackets to mount it. You just need the Voltage Regulator for a 1970 - 1986-ish Dodge/Plymouth Car or Truck (to be safe, order one for a 1974 Plymouth Duster) and the Pigtail. Both parts are available over the counter at any parts store. The Voltage Regulators usually come with a handy Wiring Diagram in the box too.
Here's Mine with a Nippondenso 120a Alternator (prior to removing the engine, due to a locked up balancing shaft)
You'll have to swap the Pulley over from your old Alternator, since most ND alts are Serpentine.
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