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#1
11-05-2024, 09:21 PM
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Correct 12 bolt rear for '67 GTO?
I plan to replace the factory 10 bolt in my'67 GTO with a 12 bolt. I'm getting conflicting opinions on which rear to use. Some say the '67 Chevelle rear is a bolt in, while others say the '67 GTO has a 'wide track' rear and should use the '68/'72 Chevelle 12 bolt. I know the '67 Chevelle rear is an inch or so shorter than the 68/72 rear. So which is correct for a '67 Goat?
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#2
11-05-2024, 10:48 PM
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I don't think GTO's used the 12 bolt until 1970?
The 64-67 will fit and so will the 68-72. You might have to use a different or conversion u joint. |
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#3
11-05-2024, 10:52 PM
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Quote:
He’s asking in a roundabout way which Chevelle 12-bolt would be the same width as a 1967 GTO 10-bolt. Definitely the later 68-72 12-bolt.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/3.08 2002 WS6 Convertible LS1/4L60E/3.23 1966 VW Type 2 Single Cab Pickup 140hp 2276 1956 VW Type 2 Panel Van 36hp 1200 1957 VW Type 1 Beetle 180hp 2276 |
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#4
11-06-2024, 01:52 PM
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What drum to drum width is considered correct for '67 Lemans/GTO?
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I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#5
11-06-2024, 01:52 PM
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Quote:
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#6
11-06-2024, 03:44 PM
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65-67 Chevelle's are the same width.
https://chevellestuff.net/1965/rear_axle.htm
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#7
11-06-2024, 09:32 PM
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I used one from a 67 Chevelle. Had to change the U joint but a pretty straight forward swap.
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My money talks to me-it usually says goodbye! |
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#8
11-07-2024, 12:08 AM
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I can’t remember the exact numbers anymore, but I recall a number like 54-1/2” flange to flange for early and 55-3/8” or so for late. Believe the change was made for Pontiac for the ‘67 model year… have also talked to folks that had a late ‘66 with the wider housing too. Wider housing came on 68-72 Chevelles and 69-72 GP amongst others.
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#9
11-07-2024, 12:21 AM
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My first post was a bit of a fishing expedition to see if the answer changed. Years ago when I asked this question, I was told that '64-66 Pontiac rear ends were 60" drum to drum, and '67-72 pontiac rears were about 61" and change wide drum to drum.
The '64-67 Chevy rears were narrower and got wider in '68-72. So yes, the '68-72 Chevelle 12 bolts will be approx 61" wide. Not the path I've taken in this deal, but to each his own. https://forums.maxperformanceinc.com...d.php?t=416764
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I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 |
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#10
11-07-2024, 04:53 AM
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I have found, narrow A-body housing is 1964-67 Chevy and 1964-65 Pontiac.
Wide A-body housing is 1968-72 Chevy, 1966-72 Pontiac, 1969-72 G-body. FWIW |
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