Crank Pulley ID...

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**Mr70** · #1 09-08-2007, 05:47 PM

For Chevrolet,7 digit part numbers are usually early,original production.
5 & 6 digits are usually a red flag for a much later on in production,(or superseded part #),as they had to tap into a whole new numbering system that hadn't been used yet.

I think they went to a non deepgroove pulley after 76.

**Paul_S** · #2 09-08-2007, 08:08 PM

Yup, that's right. ..and I didn't miss a number like I was thinking after I posted.

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