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Old 12-07-2016, 06:37 PM   #1
bbbc10
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12 bolt rear end

are the 67-72 12 bolt rear ends an 73-87 12 bolt rear ends the same diff cover bolt pattern? reason I ask is I have a 12 bolt rear end that was under my 81-87 swb frame an a guy is selling a watts link that is for 67-72 12 bolt rear end an I need to knw if it will bolt up to my 12 bolt rear end
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Old 12-07-2016, 08:42 PM   #2
69heavychevy
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Re: 12 bolt rear end

covers are the same, btw 80 was the last year for 12 bolts. mounting points/dimensions are different, also have to figure trailing arm/leaf spring differences
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80 C10 SWB Step Side - 350 w/ vortec heads, TH350, 12-bolt 3.73
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Old 12-07-2016, 09:38 PM   #3
bbbc10
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Re: 12 bolt rear end

Im not worried bout all that....i jus need to knw if the bolt pattern for the diff cover is the same
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Old 12-07-2016, 10:34 PM   #4
friscobob
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Re: 12 bolt rear end

My 81 seems to have a 12 bolt.
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Old 12-10-2016, 12:52 PM   #5
Bloodhound
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Re: 12 bolt rear end

Quote:
Originally Posted by friscobob View Post
My 81 seems to have a 12 bolt.
Same here. I thought 81 was the last year.
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Old 12-11-2016, 03:56 PM   #6
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Re: 12 bolt rear end

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Originally Posted by Bloodhound View Post
Same here. I thought 81 was the last year.
Did the 12 bolt end in 81 or? What was it replaced with? Is the replacement a bolt in for earlier chassis? Which is better, 12 bolt or later?
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