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|Alternator Case Type:||Cast|
|Alternator Finish:||Same as OEM|
|Amperage Rating:||60 A|
|External Fan Included:||Yes|
|Pulley Diameter:||74 mm|
|Pulley Type:||1 V-Groove|
|Regulator Plug Clocking:||12:00|
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Q:There is a 5" diameter and a 5.5" diameter.How do I know which one to buy for my 81 Datsun 510?
A:I would recommend visiting a local Advance Auto Parts store and purchasing a Haynes manual for your vehicle. This will have many of the specifications needed for a variety of repairs.