The springs pictured I do not believe are COPO springs.
As far as the casting number, ALL 4 series standard or COPO used the same casting #.
The PN is different but not on the carrier.
The side gears for COPO are 16 teeth vs 18 on a standard 12 bolt.
It does kind of look like this unit has 16 tooth side gears, but you can not tell by that picture for sure.
And if it was a BE/KQ carrier, good luck finding the parts needed to make it complete. JMO
Mike
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