Shaft measures 1.125" and is 48 tooth fine spline. Finish is black oxide with a 2.00" blower pulley register and six blower pulley mounting bolt holes that are 3/8-16". Fits most all BDS long blower snouts. From snap ring groove to end of splines is 2.750".
This shaft is typically used in the 5.750" or 8.125" blower snouts. Drive shaft has a .500" ratchet provision to turn the engine over to help set valves or ignition timing.