I'll be useing those joints in my F Stock Duster, in fact the shaft is CM and came out of an G Stock that carried the wheels two ft. He had the conversion joint in the back but I'll use the Dana 7260 yoke with solid joints and not worry too much. The axle people offer CM yokes that take the big racing yoke everyone uses today, can't remember the # off hand, overkill for your app imo. All A-Bodys after 70 came with the small joint, even 3-4 speeds if I remember right.