clementine said So if Im reading this correctly, You change to a B/E mainshaft ? View attachment 1716183305 View Larger Image Part # 3DFS833G 188709Manual 4-Speed A833 12″ Tailhousing 30 Spline Output ShaftManual 4-Speed A833 12″ Tailhousing 30 Spline Output Shaft.Replaces 12″ Tailhousing.60’s and 70’s muscle cars.A-body applications require change to B/E-body output shaft, modified GV adapter, and A-body adapter plate. Click to expand...