This looks pretty close to the Plane Power alternator. Unlike the Prestolite  alternator, it looks like the diode assembly is not repairable. But it can be replaced without soldering. If you remove the rectifier assembly and take it to NAPA they can probably match it up. This is definitely a job for the hangar fairies. It is not legal in any form. Re-soldering a fractured diode is just a repair and would be legal, but replacing a part with and automotive replacement would not. That bei