Alternator pulley size

[Sal Lubrano]

Does anyone know the stock Diameter for the alternator pulley. 86-87 GN 120 amps.

 

[Sal Lubrano]

Someone has to know which pulley size came stock. I have a few different size pulleys and don't know which one is correct.

 

[salvageV6]

I just measured my RJC razor stock replacement aluminum one.

Diameter of the top of the 6 grooves where the belt rides was 2.495" so I'd say 2.5".

Lips on the sides can vary, of course, and will be higher.

Stockers are all on cars so I can't measure one easily.

 

[Sal Lubrano]

Thank you.