no no no, not on a "B" type machine, no GM alternator would work. Only the specialized Datsun made by Denso. This isn't a Mitsubishi by any means.If you have a starter / alternator repair shop local to you start there. They may be able to repair or rebuild it. They may also suggest a less expensive alternative to the original. Many use a GM alternator with internal voltage regulator but you will probably have to build a new bracket as alignment may not be the same as the original.