Gm 3921923bm single groove pulley ?????

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**JRSully** · #1 03-12-2018, 10:54 AM

Post a pic of it, if you have it. I have had one of these for years, same p/n and wondered if it was orig or not. I cannot see Chevy having the same for a single and double groove pulley, but who knows for sure

**STEFS** · #2 03-12-2018, 01:19 PM

Here are some pics As you see it has not been machined thanks joe

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