IML: insulated brush alternator

["mike and linda sutton" <mikanlin62@xxxxxxxxxxx>]

This should NOT be as difficult to find as your local parts house is making 
it for you.  I dont know where you are located geographically but that 
shouldnt be a huge issue.  Try asking them for a 1970 or later unit. 
Typically Mopar had two general styles - independent of the various 
amperage ratings and not including the mid 70s 100 amp units which are 
entirely and completely different physically - and there is one very easy 
way to recognize them.

When you view them from the back side, the wiring connection side, the 
earlier point style regulation alternators are almost entirely round, with 
what looks a lot like a yoke or part of a 3 leaf clover encasing the diodes. 
The later alternators have a definite square hump on the back of them that 
encloses the diods.  This is regardless of the alternator amperage output.

If you are dealing with an independent rebuilder or a parts store that has a 
LESTER catalog, that is an older catalog system that was nearly universal in 
the parts business for decades that was used to identify and number 
alternators, generators, and starters.  They also usually had a factory to 
aftermarket interchange and whats called a buyers guide to help identify 
these by picture as well.

As far as the voltage regulators, there are replacement solid state units 
that Napa sells as well as Mopar sells, that will replace the points style 
units with solid state units and require no changes to the wiring.  The Napa 
number was VR1001 last time I bought one, Mopar  may or may not still have 
them in stock but the number was either P3690431 or P3690432 last time I 
bought one was 5 or so years ago.  I have two vehicles switched over to the 
later - I think its 72 and later? - square back style alternator and stock 
for those years transistorized regulators.

Mikey
62 Crown Coupe 


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