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Help decoding a rear

1306 Views 13 Replies 5 Participants Last post by  Jim_66SS
Hi , Can someone help me with this rear code. I was told it was out of a 67 chevelle. Someone told me they think it is a 68-69 chevelle. I found the one that shows the ratio ( CI1219B ) Thanks in advance.

numbers CI 1219B

NF 3917124

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CI 1219B = 3.73~positraction / 121-day of 69-year / made in B=buffalo
NF 3917124 = early 12-bolt casting date rear for 69
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