Sorry Captaintobeys, I should have specified, the GL-494-RM is a newer design alternator that utilizes an internal fan. You do not reuse your old fan or pulley. You simply add a one groove pulley and you are all set. Match the diameter of the pulley as close as you can with the oringal 1G pulley size and you will run about the same ratio of alternator speed to engine speed and will be able to use the orignal fan belt.
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