What limited slip do I have?

I'm changing over from my 3.91 to my 3.23s I notice the posi is different from one to the other.

Here is the pics from my 3.23 gear








This is the pics from my 3.91 gear.






What Fluid do I use?

Thanks

First is cone style, second is clutch (preferred by most).

80/90WT with friction modifier...

Thanks guys,

Something to do today when it slows down.

Use 1 bottle of the ford friction modifyer (you can get it at the dealer) And use 80-90 or 80-140 gear lube.