Great postings everyone and please keep adding anything useful also keep your eyes peeled for any paper on that '69 Chevelle Hubleyman|.
The more we understand the facts of this whole 1969 Copo 9511 thing the better as more previously unrecognized real Copo performance option cars are exposed!.
Here's another possible below, read the ad and note the KM rear axle tube #'s and POP..
Original L78 block admittedly MIA but may be a deal for a real '69 Copo 9511 Chevelle?!
http://cars.trovit.com/index.php/cod.fra....14/org.1/pop.1
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~ Pete