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Our Z cars just didn't have
high power demands, nor did any car, 20 years ago. One of the downsides of the
stock Z car alternators is that 60 or 70 amps is all that can be had as a stock
replacement. Later model Nissan units can be used but their replacement prices
are very expensive. Even the Auto Zone's of the world sell them between $150 and
$200 and the highest output I have found is 90 amps. Yes, you can go to a
junkyard but who wants to risk the wiring and electronics on their Z? Not me,
anyway.
An alternative is to use a
Delco-Remy 10Si style alternator with an internal regulator. These alternators
were very common on all GM vehicles up to about 1985. Of course, pre-1978 Z cars
will also have to be converted over from the external voltage regulator setup.
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