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Old 10-01-2017, 10:17 PM
Bully goat 2 Bully goat 2 is offline
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Default 70 gto 10 bolt
Hi guys planning to swap my 10 bolt rear for a 12 bolt rear car is a turbo 400 will the driveshaft be the correct length?

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Old 10-02-2017, 02:55 AM
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Yes, however you'll need a 3R to 1310 conversion u-joint.

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Old 10-02-2017, 06:21 AM
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X2. I just did this for my brother's car.

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Old 10-02-2017, 09:40 AM
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Originally Posted by Kenth View Post
Yes, however you'll need a 3R to 1310 conversion u-joint.
Is this true if you have a 12 bolt from a 70 GTO (as opposed to the more common Chevy sourced ones)?

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Old 10-02-2017, 09:58 AM
'ol Pinion head 'ol Pinion head is offline
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Is this true if you have a 12 bolt from a 70 GTO (as opposed to the more common Chevy sourced ones)?
No, not true, the original 12 bolts used in the '70 GTO's are direct bolt in, a have pinion flange that accepts 3R ujoint. Same deal with many other McKinnon built 68-72 12 bolts.

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Old 10-02-2017, 11:52 AM
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Is this true if you have a 12 bolt from a 70 GTO (as opposed to the more common Chevy sourced ones)?
No issues with u-joint using a 1970-72 Pontiac (McKinnon) 12-bolt rearend.
Also some trimming of one upper arm at the rear bolt hole will be necessary.

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