Quote:
Originally Posted by Darth Menace
dont know/don't know. It is a 69 custom s. It was originally a 6 cyl, but I am not sure about the rear end
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With the cover off, you should be able to see whether the unit is of the open variety or a posi. Just Google "Auburn Posi" to see what I am talking about, then compare it to what you have behind your cover. The posi unit looks more extensive, with springs and a cone-clutch setup. I have a great picture in my service manual beside me, but I am not near a scanner. No posi=no additive required.
My best guess is that your rear end is open (that sounds weird!!!), based on the Custom S and the six cylinder mill.
I go about 22 foot pounds on the cover bolts.
EDIT: Here is a picture of a posi unit.