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Old 02-24-2011, 03:17 PM
69L72RS 69L72RS is offline
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Default Re: BE 12 bolt questions

Rick,
Yes those are COPO 4.56 gears p/n 3917973.
They are service dated gears from 1975.
From what I have been able to determine anout the different makings and locactions is that gears like these were made at a different plant than the original production gears.
Here is a set of COPO 4.10s from 1974. that match your 4.56s.
I will post pictures of the different markings that I have found this weekend.
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