8.75 Sure Grip help

GBM said

I have a 71 dart with a 408 and open 8.75 rear and want to make it a posi what are my best options ? Thanks for any help

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Can ya set it yourself or do you need a shop to do it for you.

If you need a shop then I’d just call dr.diff and but an complete center section ready to go.

If you can do it yourself then find a stick style clutch pack style or go eaton tru trac.