Yes they do - that aforementioned airpump
(all cars after June '76 until ~ '79 sometime...)
After that they magaed to ditched the airpump in favour of a more passive
scheme...
The < '79 cars had a double crankshaft pulley 'cos they had to drive
that airpump, as well as the alternator. I think that the outside one drove the
alternator, which was a hassle, since that required a different alternator bracket...
Anyway, I assume from your comment that you have a 'normal' pulley,
so I wouldn't worry about it - like Brackie says, no-one give a rats-xxxx
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