Hi, 
  
My alternator failed on my Z last week.  I bought one off another 350 from a breakers.  I took the old one off and compared the two before i fitted the new (breakers) alternator.  On comparrason I could see that one of the belts was slightly smaller on the new alternator?  I was told the alternator was from a 2003 model so it should have been the same, the only difference I can think of is mine is an import and the new one was from a UK spec so my questions are... 
  
1, Can I fit the new one with the smaller belt?  Or shall I change the pulley from the old one to the new one? 
2, What does the difference in belt size mean 
3, Will it affect what amps I get out the alternator 
4, How do I test what is coming out the alternator?  If I can? 
  
Thanks in advance 
  
Robert