OK, I've been told that I can use PRE 1989 Chevy blazer rearend G80 posi units and Ring Gear in my G-body.
Of course (.....par for the course) I find a perfect G80, GT4 (Posi 3:73), but it is out of a 1993 Olds Bravada.
Now from what various members have told me, the only difference is that...