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Old 03-12-2010, 12:28 AM   #27
MTCK
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Join Date: Dec 2009
Location: Fairbanks, AK
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Re: Decisions on how to proceed on 87 GMC

I believe 12 bolts stopped being made after 1982 or so. That is likely a 10-bolt you found. I would be suprised if it bolted in. I would try to find a rear end from a 73-87 truck. You might think about regearing if all yours needs is a brake job. In my experience hunting around the 2.73's, 3.08's and 3.42's are much more common than the 3.73's or 4.10's...
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