BERTRAM Posted October 4, 2019 Share Posted October 4, 2019 I am in the process of converting my 1963 B61 from a generator 12 volt positive ground to an alternator and negative ground. My question to anyone who has done this, is what should be done as far as the pulley goes? The generator has the original 2 groove pulley and the pulley on the new alternator has a narrow one groove pulley. Should I just change out the pulley to a single wider one? Is it ok to run with just one belt? I don't believe the alternator shaft is long enough to install a double pulley. Thanks in advance for any advice. Quote Link to comment https://www.bigmacktrucks.com/topic/59286-alternator-conversion/ Share on other sites More sharing options...
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