Are you talking about 8 3/4 b-body axles?If so then you need to find a 30 spline power-lock suregrip.
Oh.... the dana has two different axle lengths.

I would contact DoctorDiff he has a good deal on axles plus he sells suregrips.
http://members.aol.com/doctordiff

Last edited by 70SWGR; 06/26/08 10:59 PM.