spider alternator

[Alfanovice@domain.elided]

Last winter I installed a rebuilt alternator in my 71 spider.  It never 
worked right so I sent it back for warranty repair.  It worked great for six 
months and now I am getting no amps out of it.  I think this particular unit 
is haunted, so my question is to those in the know:  
Should I purchase an identical stock alternator and from what source has been 
reliable? Or is there an upgrade to a newer or otherwise different alternator 
that works correctly on this car?  Any advice is humbly appreciated and 
eagerly awaited.
Brian Ancelin
Denton, Texas
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