Gearing change on 12-bolt 2-series?

ElCamino70SS said:

Hi everyone!

Is there a good kit to get for rebuilding my 1970 12-bolt rear?

I currently have 2.73 gearing and want to step up to 3.55!

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You will have to get a 3 series carrier to change to 3.55 gears.

burrodebo said:

Find Big Gear Head (Freddie). He can get you everything you need, good parts, reasonable cost.

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X2. I got my 3.42 gear set and installation kit from Freddie along with a Lock Rite unit to make my open rear posi.
If you want posi and changing out the carrier you can just get a posi unit I think.
I got my 3 series carrier from TC member TLowe.