rear end do i have in my 87' iroc z 305 tpi? What gears does that rear come with and is it a posi/limited slip?

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Red 87'Z-28 350 tpi,MSD ignition 6al,gutted maf and airbox,
700r4 w/b&m shift kit and cor. servo

 

Check the RPO codes on the SPID label in the center console, or take a wire brush to the bottom of the axle tubes for a stamped alphanumeric code. Either one will tell you. The code on the axle itself is better in case the whole rear has been swapped before.

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