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FED 387 · 12-25-2010, 01:28 AM

Larry--I forgot to mention that that code is for a 68 or 69 rear end however see what the date code cast into the ribs on the left side of cast iron differential are ---also what is the serial number of your car you might have a very early 70 model and they had left over 69 housings to use up when they built your car

12-25-2010, 01:28 AM	#1
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 530 Liked 333 Times in 180 Posts	Re: 12 Bolt GM ? Larry--I forgot to mention that that code is for a 68 or 69 rear end however see what the date code cast into the ribs on the left side of cast iron differential are ---also what is the serial number of your car you might have a very early 70 model and they had left over 69 housings to use up when they built your car