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As current '69 'Velle thread, some factory GM info noted Copo 9511 necessary to get 4:56 or 4:88 for 1969 cars only....all models.
Even though 9511 not noted w/ this L88's paperwork, the M22 may be specific to suit rear also the 9511 may've shown if 4:56 part was printed info, not added w/ pen?:hmmm:
:beers:
~ Pete

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Update info
 

Hello Tim,
The VIN is 194679S722688 to answer your question.
Best Regards,
Drew Papsun
203-286-6024

I jumped to the assumption that COPO meant large volume because it is my understanding that a GM dealer wasn't able to put in an order for a 427 Camaro or Chevelle due to the ban on anything larger than 400 in a Camaro or Chevelle. The way around the issue, allegedly, was to order enough vehicles in order to qualify the order as a "fleet" purchase and apparently "fleet" purchases could be ordered with any engine available. The "order enough" vehicles is why I assumed a volume buy was required. That is also why I understand that a few dealers got together and ordered as a group, so they could order the required number.

Believe me, I am not claiming I know what I am talking about :laugh:

The COPO fleet order makes those cars special (in my mind) simply because not every dealer could or would want to place a large order. That being said, the apparent fact (or possibility) that a certain trans or rear gear may have required a COPO order isn't special in my eyes if any dealer could have placed that order.

Ticking a box on a different order form (the COPO form) in order to get 4.88 gears, something that (it sounds like) any dealer could have done just isn't the same (again, to me) as a dealer or a couple of dealers getting together to pull the wool over GM's eyes, go against company policy, and order something GM said it won't allow.

COPO ordered 4.88's isn't special if that was simply the process needed in order to get that ratio. The gear ratio itself may be worth talking about if it is one of three (or whatever) to get the ratio but that it had to be ordered through COPO ... meh ... not seeing it as special :)

Please keep in mind, this is just my opinion and I have already admitted to not knowing what I am talking about :)

Drew, thank you so much. I want to put the VIN with the tank sticker in my files.

That is where my head was on it Pete, speedo gear adjustment

9S721263 has almost the same options - L88, M22, 4.56 - and it doesn't list the COPO trans.
ZW1 is that it's an internal RPO and would not have shown up on the window sticker or shipper. That said, I don't know why it's listed at all.

The VIN is actually 194679S721688, not 9S722688.

Thank's Kurt. I googled the VIN and it is 21688.