12 Bolt Posi identification - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-09-2002, 02:26 AM
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Post 12 Bolt Posi identification

Have a chance to get a 12 bolr posi unit for my '66 chevelle. The owner doesn't know what it fits and neither do I. It is a GM part that the tag reads "Diff Case 1-#488373" and on the case are the numbers "250" and "B-29-2"
Any help in identifying this would be great. Thanks....
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Old 12-09-2002, 09:56 PM
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I have a 67 chevelle and as far as I know, but don't quote me on this but the 66-67 had the same length rear end which is I beleive 60 inches in leanth where in 68-72 there something like 62 and a half inches long.this does not include the brakes or the brake plates. just from one end behind the brakes to the other end.plue the bolt in paterens are different. I can't say it would be worth having it cut down.
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