1970 Camaro rearend

[Big Block Bill]

Originally Posted by luzl78

ss l78 and 350 got the 12 bolt

I thought a 12 bolt came in any 1970 Camaro with any engine that had a 4bbl, but the 3:73
ratio was standard on the Z-28 with the 4:10 optional. I do not know about the L-78 in 1970,
so my vote is it came out a 1970 Z-28.

Bill

[L16pilot]

Originally Posted by Big Block Bill

I thought a 12 bolt came in any 1970 Camaro with any engine that had a 4bbl, but the 3:73
ratio was standard on the Z-28 with the 4:10 optional. I do not know about the L-78 in 1970,
so my vote is it came out a 1970 Z-28.

Bill

Correct Bill...only the Z28 could have gotten the 3.73s. L78s were 3.55 std and 4.10 optional.

[iluv69s]

70 Z , T/A or Formula.

[Big Block Bill]

Originally Posted by iluv69s

70 Z , T/A or Formula.

Did Pontiac use the COZ code as well? Bill

[iluv69s]

Originally Posted by Big Block Bill

Did Pontiac use the COZ code as well? Bill

Yup.. COZ was 3.73 posi on Pontiacs also.

[Budz]

Originally Posted by DAVE H

First off, a huge thank you to all who responded, much appreciated.
I'm going to take a swing at this, as my friend is a "as-is" flipper and it will be for sale. I'm looking at it first hand today. I enjoy restoration projects and reuniting rare parts with appropriate applications. I'll let ya'll know if I'm successful, he's a tough negotiator.

Dave

If he knows what he's got, he'll be asking 10x what he paid for it, but hopefully you can get it...Good luck!

[keith k]

The COZ 3.73 12-Bolt was fitted to all '70 Trans Ams with the M21 4-speed, or M20 and M40 cars with the Performance Axle option.

Also available on '70 Formulas. My RA III / M21 Formula has a COZ.

[DAVE H]

If he decides to advertise it, I'll let you all know. I won't be buying it.

Dave

[GM Powertrain]

Race track deal! Thought those days were long gone.

[DAVE H]

I see it is now listed on marketplace, so just letting you know in case someone is in need. Good luck.
Dave.