C body 8 3/4

You can even have those C axles shortened and redlined.
Can't do that with B body axles

X2. If your going to narrow it significantly and mount your springs inside the frame rails, the C body rear is the one you want. Reason being is the axles have enough meat on them all the way up the shaft to be able to respline even a heavily shortened axle. Good score for that money!!